Physics, 22.09.2019 02:30 gdestini165

Acar travels at a constant velocity of 20.0 meters/second for 15 seconds. what is the power of the car if the initial force applied to it was 95 newtons?

Answers: 2

Show answers

Answers

Work done by the force = Force x displacement. Power = work done/time = F.s/t = F.u.t/t = F.u = 95 x 20 = 1900J. {S=ut because acceleration is zero since car is moving at constant velocity}.

Answer from: Toady7396

The correct answer to the question is 1900 Joule.

CALCULATION:

As per the question, the velocity of the car v = 20.0 m/s.

The time taken by the car t = 15 seconds.

The initial force applied on the car F = 95 N.

We are asked to calculate the power of the car.

Let the displacement of the car is denoted as S.

Let the power of the car is P.

The power of a car is defined as the word done by the car per unit time.

Hence, the power P = $\frac{W}{t}$

= $\frac{\vec F.\vec S}{t}$

= $\vec F.\frac{S}{t}$

= $\vec F.\vec v$

= $Fvcos\theta$

Here, $\theta$ is the angle between force and velocity.

If $\theta= 0^{0}$ , then P = Fv.

Hence, the power of the car is calculated as -

P = 95 N × 20.0 m/s

= 1900 Joule.

Answer from: Quest

i wanna say it’s between b and d, leaning more towards b.

Answer from: Quest

Aform of energy that is reflected or emitted from objects in the form of electrical and magnetic waves that can travel through space. there are many forms of electromagnetic energy including gamma rays, x rays, ultraviolet radiation, visible light, infrared radiation, microwaves and radio waves.

Another question on Physics

Physics, 22.06.2019 05:30

Suppose you have three polarizing filters, with the second at an angle of 42∘ to the first and the third at an angle of 90∘ to the first. by what perfect will the original intensity of unpolarized light be reduced to after passing through all three filters?

Answers: 2

Answer

Physics, 22.06.2019 06:40

Determine the change in width a, height b, thickness t when a plate is subjected to the uniform distributed load and is made of material having modulus of elasticity e=230 gpa and poisson's ratio ν=1/3. given : a=400 mm and b= 300 mm also the uniformly distributed load in downward y direction of plate is 2 mn/m and in the positive x direction is 3 mn/m and t=20 mm

Answers: 1

Answer

Physics, 22.06.2019 11:00

Although longitudinal waves can travel through all media types what is the disadvantage of this type of wave transmission? a) he efficiency of he wave transmission is greatly diminished as the media becomes less dense b) the oscillation of one set of particles has a huge impact on neighboring particles c) particles become too close together as they bump into each other making it more likely to hit other particles down the line

Answers: 2

Answer

Physics, 22.06.2019 14:00

Select for each of the following statements whether it is correct or incorrect. (a) in an isothermal expansion of an ideal gas. (b) the temperature remains constant. (b) the pressure remains constant. (c) there is work done by the gas. (d) there is heat added to the gas. (e) the change in internal energy equals zero.

Answers: 1

Answer

You know the right answer?

Acar travels at a constant velocity of 20.0 meters/second for 15 seconds. what is the power of the c...

Questions