Find the acceleration of a car that goes from 32 m/s to 96 m/s in 8.0s

Answer: 2.5 m/s and 6.25 m

Explanation:

u = 0

a = 0.5 m/s²

t = 5 s

v = u + at

=  0 + 0.5 × 5

= 2.5 m/s

s = ut + 1/2 at²

= 1/2 × 2.5 × 5

= 6.25 m

Answer:

100N

Step-by-step explanation:

If I push on a desk with a force of 150 N to the right and my friend pushes on the same desk with a force of 50 N to the left, this means that I pushed the desk in the positive x direction and the force I applied is F1 = +150N; my friend pushes the desk in the negative x direction and the applied force will be F2 = -50N.

The net force will the sum total of both forces acting on the desk.

Net force F = F1+F2

Given F1 = +150N and F2 = -50N

Net force F = +150N+(-50N)

Net force F = +150N-50N

Net force F = +100N

This answer is not mine so credits to abidemiokin

Answer: Gravity

Explanation: Gravity is pulling down on the ball, making it stay on the floor

Answer:

609.6 cm is the answer

Answer:

because it emits the most heat thru radiation

Explanation:

It is given that, swimmers swim a total of 8 laps of a 50-meter-long swimming pool. We need to find the distance traveled by a swimmer in this meet.

Distance = total path covered during entire journey

In every lap he covers a distance of 50 m. It means in 8 laps it will cover 8×50 = 400 meters.

Displacement = shortest path covered

After 8 laps, the swimmer ultimately comes to the starting point. It means its displacement is equal to 0.

Incompletevquestion. However, I inferred from a general perspective about perpendicular lines.

Explanation:

Put simply, perpendicular lines are lines that are at right angles (90°) to each other. Thus, we could say based on this definition that for lines lll and mmm to be perpendicular they intersect and be at right angles (90°) to each other as found on the attached image.

Answer:

Daniela's Definition: AB is perpendicular to CD if the measure of <AOC equals the measure of <AOD.= Well Done! Because the measure of <COD...

Ori's Definition: AB is perpendicular to CD if AB and CD intercept perfectly sideways.= Please rework your ….

Kaori's definition: AB is perpendicular to CD if one line can be mapped to the other by a rotation about point O of 90 degrees.= Well done! I hadn't previously considered defining...

Explanation:

Kahn Academy

Answer:

Explanation:

At t = 1 velocity = 0

At t = 3 velocity = 3

slope of the line = 3-0 / 3-1 = 3/2

At t = 2

velocity = 3/2 x ( 2 - 1 )

= 1.5 m /s

velocity at t = 2 is 1.5 m /s

Position at t = 2 :

displacement at t = 2

area of graph upto  t = 2

= 1 / 2 x 1 x 1.5 = .75

position at t = 2 :

= initial position + displacement

= 10 + .75 = 10.75 m

position at 6 s :

displacement at t = 6

area of curve upto  t = 6

= 1 / 2 x 2 x 3 +  3 x 3 + 1/2 x 3 x ( 4.5 - 3 )

= 3 + 9 + 2.25

= 14.25 m

position at t = 6

= initial position + displacement

= 10 + 14.25 = 24.25 m

position at 9 s :

displacement at t = 9

area of curve upto  t = 9

= 1 / 2 x 2 x 3 +  4 x 3 + 1/2 x 4 x ( 5 - 3 )- 1/2 x 2 x 1.5

= 3 + 12 + 4 - 1.5

= 17.5  m

position at t = 9

= initial position + displacement

= 10 + 17.5 = 27.5  m

Answer: 8.75 km/hr

Explanation:

Concept to know

Average speed: total distance/total time

-------------------------------------------------------

 total distance/total time

=(12.2+19.3)/(1.4+2.2) ⇔ add the numbers of two time running together

=31.5/3.6 ⇔ simplify

=8.75 km/hr

Hope this helps!! :)

Please let me know if you have any question

Responder:

Explicación:

Las fuerzas que actúan paralelas al plano son la fuerza de movimiento y la fuerza de fricción.

La fuerza de movimiento Fm = Wsinθ y la fuerza de fricción Ff = nR donde;

W es el peso del objeto = mg = 30.0 * 10

W = 300N

θ es el ángulo de inclinación = 28 °

n es el coeficiente de fricción = 0,20

R es la reacción normal = Wcosθ

La fuerza paralela al plano que se debe ejercer sobre el bloque para que se eleve con rapidez constante será la suma de la fuerza de movimiento y la fuerza frictioal (son las dos fuerzas que empujarán el cuerpo hacia arriba del plano)

Fuerza total requerida = Fm + Ff

Fuerza total requerida = Wsinθ + n (Wcosθ)

Fuerza total requerida = 300sin28 ° + 0.2 (300cos28 °)

Fuerza total requerida = 140,84 + 52,98

Fuerza total requerida = 229.17N

Por tanto, la fuerza paralela al plano que se debe ejercer sobre el bloque para que se eleve con rapidez constante es aproximadamente 229,17 N

Answer:

1. all of them

2. cork and wax

3. iron, lead, and aluminum

4. none of them

Explanation:

1.Which material will displace a volume of water?  all of them

When an object is introduced into a container with a volume of water, a volume of liquid equal to the volume of the object is displaced

2.Which material will displace a volume of water less than its own volume?

cork and wax

because  the density of the object is less than that of the displaced liquid

3.Which material will displace a volume of water equal to its own volume?

iron, lead, and aluminum

because  Arquimedes's principle: any body plunged inside a fluid in this case water experiences an ascending force called push, equivalent to the weight of the fluid removed by the body

4.Which material will displace a volume of water greater than its own volume?

None of them

Answer:

1. all of them

2. cork and wax

3. iron, lead, and aluminum

4. none of them

Explanation:

Answer:

76352 g

Explanation:

Start by reducing the first quantity to grams, since a) additions can not be performed among quantities given in different units, and b) the answer is required in grams so better to express everything in grams.

75 kg = 75000 g

Then the addition becomes: 75000 g + 1352 g = 76352 g

Answer: 18.56 m/sec

Explanation:

Average velocity =distance/time=5400/(4.85*60)=18.56 m/sec

Answer:

24 meters

Explanation:

From 0 - 4 secs. the distance traveled forward 8 meters. From 4 - 6 secs. the distance traveled another 8 meters forward. Then from 6 - 10 secs. the distance traveled backward 8 meters for a total of 24 meters.

Answer:

#1: 8.92 x 10^6 = 8920000

#2: 3.05 x 10^-3 = 0.00305

Explanation:

Answer:

Kinetic energy

Explanation:

Answer:

45 degrees

Explanation:

Answer:

Look below

Explanation:

The number of electrons, determines the chemical properties of the atom. Protons contribute to the mass of an atom and provide the positive charge to the nucleus. The number of protons also determines the identity of the element. Electrons have a negative charge. Since the atom electrically neutral, the number of electrons must be equal to the number of protons. The electrons arrange themselves in energy levels around the nucleus.

Answer:

Look above

Explanation:

The number of electrons, determines the chemical properties of the atom. Protons contribute to the mass of an atom and provide the positive charge to the nucleus. The number of protons also determines the identity of the element. Electrons have a negative charge. Since the atom electrically neutral, the number of electrons must be equal to the number of protons. The electrons arrange themselves in energy levels around the nucleus.

Answer:

Scientific models have two basic types. FALSE.

Hoped I helped

Answer:

Ideally, the work output of a lever should match the work input. However, because of resistance, the output power is nearly always be less than the input power. As a result, the efficiency would go below [tex]100\%[/tex].  

Explanation:

In an ideal lever, the size of the input and output are inversely proportional to the distances between these two forces and the fulcrum. Let [tex]D_\text{in}[/tex] and [tex]D_\text{out}[/tex] denote these two distances, and let [tex]F_\text{in}[/tex] and [tex]F_\text{out}[/tex] denote the input and the output forces. If the lever is indeed idea, then:

[tex]F_\text{in} \cdot D_\text{in} = F_\text{out} \cdot D_\text{out}[/tex].

Rearrange to obtain:

[tex]\displaystyle F_\text{in} = F_\text{out} \cdot \frac{D_\text{out}}{D_\text{in}}[/tex]

Class two levers are levers where the perpendicular distance between the fulcrum and the input is greater than that between the fulcrum and the output. For this ideal lever, that means [tex]D_\text{in} > D_\text{out}[/tex], such that [tex]F_\text{in} < F_\text{out}[/tex].

Despite [tex]F_\text{in} < F_\text{out}[/tex], the amount of work required will stay the same. Let [tex]s_\text{out}[/tex] denote the required linear displacement for the output force. At a distance of [tex]D_\text{out}[/tex] from the fulcrum, the angular displacement of the output force would be [tex]\displaystyle \frac{s_\text{out}}{D_\text{out}}[/tex]. Let [tex]s_\text{in}[/tex] denote the corresponding linear displacement required for the input force. Similarly, the angular displacement of the input force would be [tex]\displaystyle \frac{s_\text{in}}{D_\text{in}}[/tex]. Because both the input and the output are on the same lever, their angular displacement should be the same:

[tex]\displaystyle \frac{s_\text{in}}{D_\text{in}} =\frac{s_\text{out}}{D_\text{out}}[/tex].

Rearrange to obtain:

[tex]\displaystyle s_\text{in}=s_\text{out} \cdot \frac{D_\text{in}}{D_\text{out}}[/tex].

While increasing [tex]D_\text{in}[/tex] reduce the size of the input force [tex]F_\text{in}[/tex], doing so would also increase the linear distance of the input force [tex]s_\text{in}[/tex]. In other words, [tex]F_\text{in}[/tex] will have to move across a longer linear distance in order to move [tex]F_\text{out}[/tex] by the same [tex]s_\text{out}[/tex].

The amount of work required depends on both the size of the force and the distance traveled. Let [tex]W_\text{in}[/tex] and [tex]W_\text{out}[/tex] denote the input and output work. For this ideal lever:

[tex]\begin{aligned}W_\text{in} &= F_\text{in} \cdot s_\text{in} \\ &= \left(F_\text{out} \cdot \frac{D_\text{out}}{D_\text{in}}\right) \cdot \left(s_\text{out} \cdot \frac{D_\text{in}}{D_\text{out}}\right) \\ &= F_\text{out} \cdot s_\text{out} = W_\text{out}\end{aligned}[/tex].

In other words, the work input of the ideal lever is equal to the work output.

The efficiency of a machine can be measured as the percentage of work input that is converted to useful output. For this ideal lever, that ratio would be [tex]100\%[/tex]- not anything higher than that.

On the other hand, non-ideal levers take in more work than they give out. The reason is that because of resistance, [tex]F_\text{in}[/tex] would be larger than ideal:

[tex]\displaystyle F_\text{in} = F_\text{out} \cdot \frac{D_\text{out}}{D_\text{in}} + F(\text{resistance})[/tex].

As a result, in real (i.e., non-ideal) levers, the work input will exceed the useful work output. The efficiency will go below [tex]100\%[/tex],

Answer: please find the attached file for the solution.

Explanation:

In a velocity time graph for the motion of the body, the total distance covered by the body is area under the graph.

Please find the attached file for the solution.

Answer:

gravitational force

Answer:

The required answer is 498 gram

Answer:

When one object exerts a force on another object, the second object exerts the same size force on the first object

Explanation:

Answer:

Transformers are devices used in electrical circuits to change the voltage of electricity flowing in the circuit. Transformers can be used either to increase the voltage or decrease the voltage.

Answer:

800 +2 is 802 is decilitre

o.802 is in l

Answer:

scientific journal

in my guess

Answer:

scientific journalExplanation:

Answer:

The  time is  [tex]t = 8.78 \ s[/tex]

Explanation:

From the question we are told that  

  The  initial height of the eye  is  [tex]h _1 = 20 \ cm = 0.2 \ m[/tex]

  The  height of the eye when you jumped up is [tex]h_2 = 150 \ cm = 1.5 \ m[/tex]

 An illustration of this question is shown on the first uploaded image

Generally the radius of the earth is  [tex]R = 6.38*10^{6} \ m[/tex]

Now from the diagram first sun means first time you saw the sun and  the second sun means second time you saw the sun then

   H is the height increase when you quickly stood up which is mathematically evaluated as

        [tex]H = h_2 -h_1[/tex]

        [tex]H = 1.5 - 0.2[/tex]

        [tex]H = 1.3 \ m[/tex]

Also [tex]\theta[/tex] i the angular displacement between the first and second position and from geometry it is also the angle at  one of the sides of the right angle triangle

Applying Pythagoras theorem

     [tex](R+H)^2 = K^2 + R^2[/tex]

=>   [tex]R^2 + H^2 + 2RH = K^2 + R^2[/tex]

Now given that H is very small compared to R the we ignore [tex]H^2[/tex]

So

     [tex]R^2 + 2RH = K^2 + R^2[/tex]

=>    [tex]K = \sqrt{2RH}[/tex]

=>     [tex]K = \sqrt{2 * 6.38*10^6 * 1.3 }[/tex]

=>      [tex]K = 4073 \ m[/tex]

Now the [tex]\theta[/tex] is mathematically evaluated using SOHCAHTOA as follows

      [tex]tan \theta = \frac{K}{R}[/tex]

      [tex]\theta = tan^{-1}[ \frac{K}{R}][/tex]

=>   [tex]\theta = tan^{-1}[ \frac{ 4073}{6.38*10^{6}}][/tex]

=>   [tex]\theta = 0.0366^o[/tex]

Generally

  [tex]1 \revolution\ around \ the\ earth = 24 \ hours = 86400 \ seconds = 360 ^o[/tex]

So  

    [tex]\frac{\theta}{360} = \frac{t}{86400}[/tex]

=>  [tex]\frac{0.0366}{360} = \frac{t}{86400}[/tex]

=>  [tex]t = 8.78 \ s[/tex]

Answer:

The acceleration is constant and positive

Explanation:

The straight line indicates that the acceleration is constant, while the positive slope indicates that the line is positive.

Answer:

^^^

Explanation: