The planets move on linear motion without acceleration. Motion in one spatial dimension is described as linear motion, often known as uniform motion or rectilinear motion.
Explain about the Linear motion?Moving in a straight line is the motion that an object naturally exhibits. A forceless item will move in a straight line indefinitely, according to Newton's First Law of Motion.
An object is said to be moving linearly when it has a tendency to move in a straight line. Rectilinear motion is another name for linear motion. Many of the things we do every day, like walking, bowling, playing on a slide, etc., exhibit linear motion in reality.
Both the ultimate displacement and the velocity are positive, indicating that they are moving in the same direction. The link between displacement, average velocity, and time is described by the equation x = x0+(average v)t.
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How can I figure out the area of something in physics?
Area in physics can be found by division of the area into simple figures such as triangles, rectangles and trapezoids and offsets from a straight line.
How to find area in physics?Area is a measure of how much space is there inside a shape and calculating the area of a shape or surface can be useful in everyday life.
The amount of surface a two-dimensional shape can cover which is measured in square units is called area and the SI unit of area is the square meter.
Area = length x breadth and Area = π × radius × radius - formulas can be used for finding area of different quadrilaterals.
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a string is under a tension of 760.0 n. a 1.7 m length of the string has a mass of 4.8 grams. what is the speed of a transverse wave of wavelength 0.50 m in this string? what is the frequency of the wave?
The number of waves that pass by each second is the frequency of a wave, which is expressed in Hertz (Hz). For instance, a sound wave may have a frequency of 450 Hz.
Explain about the frequency of wave?
The wave frequency is the quantity of waves that pass a certain location in a predetermined amount of time. The SI unit for wave frequency is the hertz (Hz), and 1 hertz is equal to 1 wave passing through a fixed point in 1 second. When two waves of equal amplitude and frequency are compared, the higher frequency wave has greater energy.
Divide the wave's velocity by its wavelength to determine its frequency. The unit for frequency is Hertz (Hz), so use that while writing your response. The frequency will be the inverse of the time, or 1 divided by T, if you need to determine it from the amount of time it takes for a wave cycle to complete, or T.
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PLEASE ASAP HELP, ILL GIVE WHATEVER POINTS I CAN BUT PLEASE HELP ASAP ASAP
Paul was kicking around a soccer ball with his friend Leo the Lion. Paul decided to kick the ball off a 9.63 m tall cliff and lands on the ocean, 8.85 m away from the edge of the cliff.
Th ball is in the air for S._______m/s
The horizontal velocity of the ball as it rolls off the table is_________m/s
The vertical velocity of the ball right before it hits the ground is________m/s
The horizontal velocity of the ball right before it hits the ground is___________m/s
The initial vertical velocity as soon as the ball comes of the cliff is________m/s
(1) The ball is in the air for 1.4 seconds.
(2) The horizontal velocity of the ball as it rolls off the table is 6.32 m/s.
(3) The vertical velocity of the ball right before it hits the ground is 13.72 m/s.
(4) The horizontal velocity of the ball right before it hits the ground is 6.32 m/s.
(5) The initial vertical velocity as soon as the ball comes of the cliff is 13.72 m/s.
What is the time of motion of the ball?The time of motion of the ball is calculated by applying the following equation.
t = √(2h/g)
where;
h is the height of the cliffg is acceleration due to gravityt = √(2h/g)
t = √(2 x 9.63 / 9.8)
t = 1.4 seconds
The horizontal velocity of the ball is calculated as follows;
v = d/t
where;
d is the horizontal distance travelled by the ball = 8.85 mv = 8.85 m / 1.4 s
v = 6.32 m/s
The vertical velocity of the ball before it hits the ground is calculated as;
vf = vi + gt
vf = 0 + 9.8 x 1.4
vf = 13.72 m/s
The horizontal velocity of the ball right before it hits the ground is calculated as;
the initial velocity of a projectile = final horizontal velocity
vxf = vxi = 6.32 m/s
The initial vertical velocity as soon as the ball comes off the cliff = final vertical velocity = 13.72 m/s
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A weightlifter lifts a 32 kg barbell a distance of 0.1 m in 0.83 s. How much power is demonstrated by the lift?
Answer:
Explanation:
Work:
A = m·g·h = 32·9.8·0.1 = 31.36 L
Power:
N = A / t = 31.36 / 0.83 ≈ 38 W
four amperes of current exist in the primary coil of a transformer. the voltage across the primary coil is 120 v. what is the power output of the secondary coil?
480 W is the power output of the secondary coil.
primary coil current = ip = 4A
primary coil voltage = vp = 120v
power out put of secondary coil
p = vi
= 120v * 4A = 480W.
What is power?Power is the amount of work completed in a given amount of time. Watt (W), which is derived from joules per second (J/s), is the SI unit of power. Horsepower (hp), which is roughly equivalent to 745.7 watts, is a unit of measurement sometimes used to describe the power of motor vehicles and other devices.
The rate at which work is performed on an object is referred to as its power. Power is a temporal concept. It has to do with how quickly a task gets completed. The power equation is described below.
Power = Time + Work
P = W / t
The standard metric unit for power is a Joule/second, which is defined as the product of the standard metric units of work (the Joule) and time (the second).
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the triceps muscle in the back of the upper arm extends the forearm. this muscle in a professional boxer exerts a force of 1495 n with an effective perpendicular lever arm of 2.10 cm , producing an angular acceleration of the forearm of 125.0 rad / s2 . what is the moment of inertia of the boxer's forearm?
The moment of inertia of the boxer's forearm that has an angular acceleration of 125.0 rad / s² is 0.25 kg m²
τ = F * ⊥d
τ = Torque
F = Force
⊥d = Perpendicular distance
F = 1495 N
⊥d = 2.1 cm = 0.021 m
τ = 1495 * 0.021
τ = 31.395 N m
τ = I α
I = Moment of inertia
α = Angular acceleration
α = 125 rad / s²
I = τ / α
I = 31.395 / 125
I = 0.25 kg m²
Therefore, the moment of inertia of the boxer's forearm is 0.25 kg m²
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water flows from the pipe shown in the figure with a speed of 8.0 m/s what is the water pressure as it exits into the air? what is the height h of the standing column of water?
The atmosphere supports a column of mercury with a height of 760 mm. Supports a 32 m high water column. And, of course, that's why we fill the barometer with mercury instead of water or alcohol.
The vapor pressure of mercury is also minimal. Therefore, the pressure at the exit point is equal to atmospheric pressure. This pressure is therefore equal to 10 to the power of 5 times 1.1. The base area of this water cube is 12" x 12" = 144 square inches. So, the pressure at the bottom of the water cube is 62.4 pounds / 144 square inches = 0.433 pounds per square inch (psi). The RCC column minimum size is 9" x 9" and incorporates four 12mm bars steel stiffeners and cleats of 8mm steel rings spaced 150mm center to center.
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if you run the wire through a strong horseshoe magnet, subjecting 5.00 cm of it to a perpendicular 1.75 t field, what force is exerted on the segment of wire in n?
According to the given statement 17.15 N force is exerted on the segment of wire in n.
How would you define magnitude?Magnitude is essentially "distance or quantity" in the context of physics. In terms of motion, it shows the absolute and relative size, direction, or movement of an object. It is used to describe there is something volume or scope. Quantity in physics typically refers to a size or quantity.
Briefing:The magnitude of the magnetic force on a conducting wire of length I carrying current II, and making an angle θ with a magnetic field of strength B is given by:
[tex]$|\vec{F}|$[/tex] = I l B sin 0
Rearranging to get the current:
I = [tex]$|\vec{F}|$[/tex]/ lB sin0
= 7 * 10⁻³ / 0.75 * (5.5 * 10⁻⁵)sin60
= 195.95 A
[tex]$|\vec{F}|$[/tex] = I l Bsin0
= (195.95)(0.05)(1.75)sin90
=17.15 N
I = 195.95 I
[tex]$|\vec{F}|$[/tex] = 17.15 N
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monochromatic light from a distant source is incident on a slit 0.75 mm wide. on screen 2 m away, the distance from the central maximum of the diffraction pattern to the first minimum is measured to be 1.35 mm. find the wavelength of the light.
Displacement from the center line for minimum intensity is 1.35 mm , width of the slit is 0.75 so Wavelength of the light is 506.25.
How to find Wavelength of the light?When a wave is bent by an obstruction whose dimensions are similar to the wavelength, diffraction is observed. We can disregard the effects of extremes because the Fraunhofer diffraction is the most straightforward scenario and the obstacle is a long, narrow slit.
This is a straightforward situation in which we can apply the
Fraunhofer single slit diffraction equation:
y = mλD/a
Where:
y = Displacement from the center line for minimum intensity = 1.35 mm
λ = wavelength of the light.
D = distance
a = width of the slit = 0.75
m = order number = 1
Solving for λ
λ = y + a/ mD
Changing the information that the issue has provided:
λ = 1.35 * 10^-3 + 0.75 * 10^-3 / 1*2
=5.0625 *10^-7 = 506.25
so
Wavelength of the light 506.25.
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Which statements explain current theories about dark energy and dark matter? Check all that apply. Space that appears empty actually contains dark energy and dark matter. Dark matter does not emit electromagnetic radiation. Scientists believe dark energy will cause the universe to collapse inward to a single point. Scientists theorize that dark energy is causing the expansion of the universe to accelerate. Dark matter includes all of the dust, ice, and debris that scientists observe in black holes.
The correct statements which describes current theories about dark energy and dark matter among the choices above are given below:
Space that appears empty actually contains dark energy and dark matter.Dark matter does not emit electromagnetic radiation.Scientists theorize that dark energy is causing the expansion of the universe to accelerate.The answers are options a, b, and d.
What meant by dark energy ?Dark energy refers to that energy which acts against gravity, thereby resulting in the expansion of the universe. It's major constituent is current characterized with vacuum fluctuation. It is on this premise that dark energy was theorized to be causing the expansion of the universe to accelerate and itself including dark matter is filled in empty space.
So therefore, from the simple note above, it can be deduced that this type of energy does not produce electromagnetic radiation.
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Answer:
a b d
Explanation:
Which statements explain current theories about dark energy and dark matter? Check all that apply.
Space that appears empty actually contains dark energy and dark matter.
Dark matter does not emit electromagnetic radiation.
Scientists believe dark energy will cause the universe to collapse inward to a single point.
Scientists theorize that dark energy is causing the expansion of the universe to accelerate.
Dark matter includes all of the dust, ice, and debris that scientists observe in black holes.
Your car is going to make a 400 meter run. Your car will start at rest and accelerate at a rate of 5.89 m/s/s until it reaches top speed. This process will last for 5.83 seconds. The remainder of the run will take place at top speed. Predict the top speed and the total time of the run.
The top speed of the car is 34.34 m/s and the total time of the run is 11.65 seconds.
What is the top speed of the car?
The top speed of the car is the final or maximum speed of the car and can be determined by applying the following kinematic equation.
v = u + at
where;
v is the final speed of the car or top speed of the caru is the initial speed of the cara is the acceleration of the cart is the time of motion of the carThe initial velocity of the car = 0, since the car started from rest.
The final equation for the top speed of the car becomes;
v = 0 + at
v = at
The given parameters include the following;
v = 5.89 m/s² x 5.83 s
v = 34.34 m/s
The total time of the run is calculated as follows;
s = ut + ¹/₂at²
where;
u is the initial velocity = 0t is the total time of the runs is the total distances = 0 + ¹/₂at²
s = ¹/₂at²
t = √(2s/a)
t = √(2 x 400 / 5.89)
t = 11.65 seconds
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a rocket with a mass of 4kg accelerates up from the ground at a rate of 20ft m/s^2, what is the drag force acting on the rocket if the thrust of the rockets is 150n
The drag force acting on the rocket is 80N.
Give an explanation of drag force?The divergence in velocity between the fluid and the item, also known as drag, exerts a force on it. Between the liquid and the solid object, there should be motion. Drag is absent in the absence of motion.
The air molecules are more compressed (pushed together) on the surfaces that are facing the front while being more dispersed (spread out) on the surfaces facing the back. Turbulent flow, which occurs when air layers split from the surface and start to swirl, is what causes this.
The drag force acting on the rocket F = ma
Given,
m = 4kg, a = 20ftm/s²
Substituting m and a values in the above formula,
The drag force acting on the rocket F = 4×20
The drag force acting on the rocket F = 80N.
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a track star runs a 230 m race on a 230 m circular track in 26 s. what is his angular velocity (in rad/s) assuming a constant speed? (enter the magnitude.)
Using the concepts of angular displacement, we got that 0.241 rad/s is the angular velocity of track star which runs a 230 m race on a 230 m circular track in 26 s.
We know very well that angular velocity is given by change in angular displacement per unit time.
Here, we can see that a truck distance covered and length of circular track is same.
Perimeter of circular track is equal to the distance covered by the truck.
It means, truck rounds a full circle in 26 sec
So, the angle covered by truck is 360° or 2π radian.
Initially angle is 0 radian and final angle is 2π radian
Therefore, angular velocity =(θ[tex]_f_i_n_a_l[/tex] -θ[tex]_i_n_i_t_i_a_l[/tex])/time
=> ω=(2π-0)/26
=>w=(2π/26)
=>w=(2×3.14)/26
=>ω=6.28/26
=>w=0.241 rad/sec.
Hence, when a track star runs a 230 m race on a 230 m circular track in 26 s, the angular velocity assuming a constant speed is 0.241 rad/sec.
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which combination of neurological imaging techniques contains two methods that utilize magnetic imaging?
MRI and FMRI are the combination of neurological imaging techniques contains two methods that utilize magnetic imaging.
A magnetic field and radio waves produced by a computer are used in the magnetic resonance imaging (MRI) medical imaging procedure to provide precise images of the organs and tissues inside your body.
Large, magnetized tubes are the common shape of MRI equipment. The magnetic field briefly realigns water molecules in your body as you lie within the MRI machine. To produce cross-sectional MRI pictures, which resemble the slices of a loaf of bread, radio waves induce these aligned atoms to emit tiny signals.
Your doctor can evaluate your organs, tissues, and skeletal system with an MRI without performing any intrusive procedures. It generates detailed images of the body's.
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derive from one of the laws of motion the relation between the momentum produced in a body and the force applied on the body
Answer:
The fact that change in moment is equal to force times duration can be derived from Newton's Second Law of Motion (assuming that the net force on the object is constant.)
Explanation:
Let [tex]m[/tex] denote the mass of an object. Let [tex]\Delta v[/tex] denote the change in the velocity of this object. The change in momentum of this object will be [tex]\Delta p = m\, \Delta v[/tex].
Let [tex]F_{\text{net}}[/tex] denote the net force (resultant force) on the object. Let [tex]a[/tex] denote the acceleration of this object. By the law of motion, [tex]F_{\text{net}} = m\, a[/tex], or equivalently, [tex]a = (F_{\text{net}} / m)[/tex].
Assume that this net force is constant and is exerted on this object over a period of [tex]\Delta t[/tex]. With an acceleration of [tex]a = (F_{\text{net}} / m)[/tex], the velocity of this object would have changed by:
[tex]\begin{aligned}\Delta v &= a\, \Delta t \\ &= \left(\frac{F_{\text{net}}}{m}\right)\, (\Delta t) \\ &= \frac{F_{\text{net}}\, \Delta t}{m}\end{aligned}[/tex].
Multiply both sides of this equation by the mass [tex]m[/tex] of the object to obtain:
[tex]m\, \Delta v = F_{\text{net}}\, \Delta t[/tex].
Note that [tex]m\, \Delta v[/tex] is equal to the change in momentum ([tex]\Delta p = m\, \Delta v[/tex].) Therefore, if the net force [tex]F_{\text{net}}[/tex] on the object is constant, the change in the momentum [tex]\Delta p[/tex] over time period [tex]\Delta t[/tex] will be equal to [tex]F_{\text{net}}\, \Delta t[/tex] (net impulse on the object.)
a kilogram of metal a has a volume 20% larger than a kilogram of metal b. which metal has the smaller density?
Mental A has the smaller density. An object's density is defined as its mass divided by its volume.. Density is commonly expressed in grams per cubic centimeter (g/cm3).
What is density?Density is the amount of "stuff" in a given amount of space. A block of the heavier element lead (Pb), for example, will be denser than a block of the softer, lighter element gold (Au). A Styrofoam block is less dense than a brick. It is expressed in terms of mass per unit volume.
An object's density is defined as its mass divided by its volume. Density is commonly expressed in grams per cubic centimeter (g/cm3). Remember that grams are a unit of mass and cubic centimeters are a unit of volume (the same volume as 1 milliliter).
The SI density unit is m3kg. Volume Mass Density = m3kg
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A 0.1 kg ball is kicked from the edge of a cliff so that it attains a launch speed of 20 m/s at an angle of 37 to the horizontal, as shown above. On the axes below, sketch a graph of the vertical component of the ball's velocity as a function of time for the first 3 s of motion.
The graph of the vertical component of the ball's velocity is in the attachment
What is speed?Speed is the distance moved per unit time.
What is velocity?Velocity is the total displacement per unit time of an object.
How to sketch a graph of the vertical component of the ball's velocity as a function of time for the first 3 s of motion?Since a 0.1 kg ball is kicked from the edge of a cliff so that it attains a launch speed of 20 m/s at an angle of 37 to the horizontal, as shown above. To determine the vertical component of velocity,we use the equation of motion
v = u - gt where
v = final vertical component of velocity, u = initial vertical component of velocity = u'sinФ where u' = initial launch speed = 20m/s and Ф = angle above horizontal = 37°, g = acceleration due to gravity = 9.8 m/s² and t = timeSo, substituting the values of the variables into the equation, we have
v = u - gt
v = u'sinФ - gt
v = (20 m/s)sin37° - (9.8 m/s²)t
v = (20 m/s) × 0.6018 - (9.8 m/s²)t
v = 12.04 m/s - (9.8 m/s²)t
So, for the first 3 seconds, we have
for t = 0 s
v = 12.04 m/s - (9.8 m/s²) × 0 s
v = 12.04 m/s - 0 m/s
v = 12.04 m/s
for t = 1 s
v = 12.04 m/s - (9.8 m/s²) × 1 s
v = 12.04 m/s - 9.8 m/s
v = 2.24 m/s
for t = 2 s
v = 12.04 m/s - (9.8 m/s²) × 2 s
v = 12.04 m/s - 19.6 m/s
v = -7.56 m/s
for t = 3 s
v = 12.04 m/s - (9.8 m/s²) × 3 s
v = 12.04 m/s - 29.4 m/s
v = -17.36 m/s
So, we plot the graph of the vertical component of the ball's velocity using the equation v = 12.04 m/s - (9.8 m/s²)t
Find the graph in the attachment
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what frequency fapproach is heard by a passenger on a train moving at a speed of 18.0 m/s relative to the ground in a direction opposite to the first train and approaching it? express your answer in hertz.
A passenger on a train traveling at a ground speed of 18.0 m/s in the opposite direction of the first train can hear the frequency approach at 302.05 Hz.
Which does frequency mean?The number of waves that pass a fixed place in a unit of time is referred to as frequency in physics. It also indicates how many vibrations or cycles a body in periodic motion makes in a given amount of time.
Speed is 18.0 m/s.
Consider a train moving through still air at a speed of 30.0 m/s. The train whistle produces a note with a 262 Hz frequency.
We must determine the periodicity.
Using the frequency formula
f' = f(v + [tex]v_{p}[/tex]/v - [tex]v_{s}[/tex])
Fill out the formula with the value,
f' = 262(3441+18/344-30)
f' = 302.05Hz
Thus, 302.05 Hz is the frequency.
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What kind of electronic transitions are responsible for colored light being given off?.
Answer:
The answer is photons.
a boy drops a rock off of a bridge and times its fall into a river. if it takes the rock 10.0 seconds to fall, what is the velocity of the rock when it hits the river?
The rock's impact velocity with the river is - 98.1 m/s. At the time of impact, the rock was traveling at a speed of 42.14 m/s.
Find out how fast a rock is moving ?G = -9.81 m/s2 is the acceleration of gravity close to the earth. Simply multiply the acceleration of gravity by the period of time since the object was released to determine the object's speed (or velocity).
In other words, velocity is equal to -9.81 m/s2 * time, or V = gt.
The rock was traveling at 42.14 m/s when it impacted the ocean.
Then V = -9.81 * 10 = -98.1.
There for,
The rock's impact velocity with the river is -98.1m/s .
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how much work is done when a 125 g tomato is lifted 13.6 m ? express your answer with the appropriate units.
Work done when a 125 g tomato is lifted 13.6 m is calculated as 16.66 J .
What do you understand by work done?The product of the component of force in the direction of the displacement and the magnitude is called work done by force and energy is defined as the ability to do work.
Work can be calculated by multiplying force with distance in the direction of force , and can be written as :
W = F × d
Given m= 125g = 0.125 kg
h= 13.6 m
W= P E
= m *g *h
= 0.125 * 9.8 * 13.6
Work done = 16.66 J
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a sample of gas is confined in a cylinder with a moveable piston of mass m that is initially held fixed. there is a block of mass 2m on top of the piston, as shown in the figure. a free-body diagram for the block is also shown, which includes the normal force fn exerted on the block by the piston and the weight wb of the block. the upward force that the gas exerts on the piston has magnitude fgas. what is the acceleration of the block immediately after the piston is released?
To draw a free body diagram, draw the object of interest, plot all the forces acting on it, and decompose all force vectors into their x and y components.
A separate free body diagram must be drawn for each object in question. There are not always four forces acting on an object. The number of forces represented in the free body diagram can be one, two, or three. External forces acting on an object include friction, gravity, normal forces, drag, tension, or human force by pushing or pulling. In non-inertial frames (see Frames below), conceptual forces such as centrifugal pseudo-forces are appropriate.
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Using what you have learned about series and parallel circuits, explain how some appliances in your kitchen receive power while others do not. (PLEASE HELPP)
To learn series and parallel circuits, to know the some appliances in your kitchen receive power while others do not.
What is series circuits?
A series circuit is an easy way for electrons to travel to one or more resistors. Anything that depends on a cell for power is a resistor. A bulb frequently serves as the resistor in a series circuit.
What is parallel circuit?
Branching is used in a parallel circuit so that the current is divided and only a portion of it passes through each branch. In a parallel circuit, the voltage, or potential difference, across each branch is the same, but the currents may differ.
While plugged in, a range of various electronic equipment and appliances, such as televisions, toasters, lamps, and more, can use electricity even when they're off.
Therefore, known the series and parallel circuits, the some appliances receive powers.
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blood is flowing through an artery of radius 2.0 mm at a rate of 33.0 cm/s. determine the flow rate and the volume that passes through the artery in a period of 20 s.
The flow rate and the volume that passes through the artery in a period of 20 s is Q= 4.1448cm³/s and V= 82.896cm³.
How is a flow rate calculated?We must define both the volume V and the instant in time it is flowing past represented by t in order to determine the Flow Rate denoted by Q, which is equal to V/t. In addition, the relationship between flow rate and velocity can be seen in the equation Q = Av, where A is the flow's cross-sectional area and v is its average velocity.
We must utilize the equation Q=V x A, where Q is the flow rate, V is the velocity, and A is the area, to determine the flow rate.
We must apply this formula to determine the volume. V = Q x t, where Q is the flow rate, t is the time, and V is the volume.
Converting 2mm to cm is the first thing we must accomplish.
2mm x 0.1= 0.2 cm
Currently, we utilize the calculation Q=V x A, but we must keep in mind that the area of an artery is circular, therefore we swap out A with the formula π r2.
Q= 33 cm/s x 3,14x (0.2cm)²
Q= 33cm/s x 0.1256cm²/s
Q= 4.1448cm³/s.
There is a flow at 4.1448cm³/s.
Now, using the flow rate (Q), we may
V= 4.1448 cm³/s x 20s
V= 82.896cm³.
82.896cm3 of fluid travels through the artery every 20 seconds.
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a(n) 54.8 kg astronaut becomes separated from the shuttle, while on a space walk. she finds herself 45.3 m away from the shuttle and moving with zero speed relative to the shuttle. she has a(n) 0.767 kg camera in her hand and decides to get back to the shuttle by throwing the camera at a speed of 12 m/s in the direction away from the shuttle. how long will it take for her to reach the shuttle? answer in minutes.
The overall momentum of a system is constant.
Hence, The time taken to get to the shuttle is 4.49 min.
What is the conservation of momentum ?The conservation of linear momentum is a general law of physics which states that the overall momentum of a system is constant and that the quantity called momentum which characterizes motion never changes in an isolated collection of objects.according to the linear momentum conservation theorem, we have:
M1 V1 + M2 V2 =M1 V[tex]_0[/tex]1 + M2 V[tex]_0[/tex]2.
the initial velocity is Zero
then,
M1 V1 = - M2 V2
V1 = ( - M2 V2)/ M1
V1 = - [tex]\frac{0.767 *12}{54.8}[/tex] = - 0.168 m/s
That is 0.168 m/s in the opposite direction of the camera.
the time taken to get to the shuttle is given by:
t = d/v
t = [tex]\frac{45.3}{0.168}[/tex] = 269.64 s
[tex]t_{min} =\frac{269.64}{60}[/tex] = 4.49 min.
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a truck driver slams on the brakes and skids to a stop through a displacement if the truck had double the mass find the truck's skidding distance in terms of
The braking distance does not change. Because both the kinetic energy and the frictional force are doubled.
We found that the stopping distance of a car is proportional to its kinetic energy. Energy is dissipated as heat in the brakes tires and road surface. More energy required means more stopping distance. This explains why the braking distance increases in proportion to the square of the car's speed. The kinetic energy of a car is equal to the braking force multiplied by the stopping distance.
Braking distance also depends on car speed car mass brake and tire wear and road surface. A fast heavy car with worn tires and brakes will have a longer stopping distance on wet or icy roads. Friction forces act in the opposite direction of movement, making it harder to move slowing the car down the ramp and slowing it down, thus reducing the distance covered.
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1 5kg cat is lifted 2 m into the air.how much gpe does it gain?
Answer:
Potential Energy= mgh = (5)(9.8)(2)= 98.The pressure of the gas is 112 kPa when its temperature is 35 °C.
The gas is heated to 340°C using some different apparatus.
Calculate the pressure of the gas when its temperature is 340 °C.
Assume the gas has a constant volume.
Pressure =
kPa
Answer:
Pressure = 223 kPa
Explanation:
Given:
p₁ = 112 kPa = 112 000 Pa
t₁ = 35°C; T₁ = 273 + 35 = 308 Pa
t₂ = 340°C; T₂ = 273 + 35 = 613 Pa
V - const
___________
p₂ - ?
Charles' law:
p₁ / T₁ = p₂ / T₂
The pressure:
p₂ = p₁·T₂ / T₁
p₂ = 112 000·613 / 308 ≈ 223 000 Pa or p₂ = 223 kPa
Two students are pushing a broken-down car. One student is pushing with a force of 200 N. If there is 350 N of frictional force acting against them, how hard must the second student push to cause the car to accelerate?
The second student must push with a force greater than 150 N to cause the car to accelerate.
What is the net force on the car?
The net force on the car is the sum of all the forces acting on the car. The direction of the net force on the car will determine the direction of motion of the car.
According to Newton's second law of motion, the force applied to an object is directly proportional to the product of mass and acceleration of the object.
The net force on the car is calculated as follows;
F(net) = F - Ff
ma = F - Ff
where;
a is the acceleration of the carm is the mass of the carF is the applied force on the carFf is the force of friction resisting the motion of the carFor the car to move, sum of the applied forces must be greater than the force of friction.
200 + F > 350
F > 350 - 200
F > 150
Thus, the second student must push with a force greater than 150 N before the car can accelerate.
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consider a cube with a mass of 500 kg and sides of 50 cm. calculate the pressure on the floor from such a cube.
The pressure applied by the cube of mass 500 kg and side 50 cm on the floor is 200000 Pascal
The mass of the cube is 500 kg and the side of the cube is 50 cm.
Converting the side of the cube from cm to m.
The side of the cube is 0.5 m.
The pressure applied by any body is given by the force applied by the body divided by the area on which the force is applied.
Pressure = force/area
The force applied by the cube will be equal to the weight of the cube,
The weight of the cube is 5000 Newton.
The area of only one side of the cube is in contact with the floor so the area is,
Area = 0.025 m
Putting values,
P = 5000/0.025
P = 200000 Pascal.
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