1. Questions

physics =)

A race car has a mass of 710 kg. It starts from rest and travels 40.0 m in 3.0 s. The car is uniformly accelerated during the entire time. What net force is exerted on it?

  1. 👍
  2. 👎
  3. 👁
Heart

  1. First calculate the acceleration from the distance and time using the formula:
    S=v0t+(1/2)at²
    where
    a=acceleration
    S=distance
    v0=initial velocity
    t=time
    a=2(S-v0t)/t² (assumed uniform)

    Find force F from
    F=ma

    1. 👍
    2. 👎
    MathMate

  2. Thanks a lot! I got F = 6311.11 N.

    1. 👍
    2. 👎
    Heart

  4. The answer is correct!
    Have a merry Christmas, and enjoy your holidays!

    1. 👍
    2. 👎
    MathMate

  5. F*X = KE increase = (1/2) M Vfinal^2
    Vfinal = 2*Vaverage = 2*X/T =2*(40/3) = 26.67 m/s
    F = (1/2)*(710)*(26.67)^2/40 = 6313 N

    We agree

    1. 👍
    2. 👎
    drwls

Respond to this Question

First Name

Your Response

Similar Questions

  1. physics

    Cars A and B are racing each other along a straight path in following manner: Car A has head start and is a distance dA beyond starting line at t=0. The starting line is at x=o. Car A travels at constant speed vA. Car B starts at

  2. Physics

    A race car starts from rest on a circular track of radius 400 m. Its speed increases at the constant rate of 0.500 m/s2. At the point where the magnitudes of the radial acceleration is twice the tangential acceleration, determine

  3. physics

    Cars A and B are racing each other along the same straight road in the following manner: Car A has a head start and is a distance Da beyond the starting line at t=0. The starting line is at x=0. Car A travels at a constant speed

  4. Physics

    A race car starts from rest in the pit area and accelerates at a uniform rate to a speed of 35 m/s in 11s, moving on a circular track of radius 500 m. Determine the tangential and centripetal components of the net force excreted

  1. physics

    A car starts from rest and travels for 6.0s with a uniform acceleration of 2.7m/s ^2. The driver then applies the brakes, causing a uniform acceleration of -2.0m/s^2. If the brakes are applied for 2.0s, determine each of the

  2. Physics

    A sprinter starts from rest in a 100-meter race, accelerates to his full running speed of 10.3 m/s in 1.15 seconds (assume constant acceleration) and continues at that speed for the rest of the race. (a) How far did he run before

  3. physics, dynamics

    Car A starts from rest at t = 0 and travels along a straight road with a constant acceleration of 2 m/s2 until it reaches a speed of 27 m/s. Afterwards it maintains this speed. Also, when t = 0, car B located 2000 m down the road

  4. Physics

    A car starts from rest and accelerates unifomly at 3m/s^2. A second car starts from rest 6 seconds later at the same point and accelerates uniformly at 5m/s^2. How long does it take the second car to over take the first car?

  1. Physics

    The mass of a car is 2400 kg. the constant power supplied by the engine is 60 kW and the car starts from rest. What is the speed of the car at the end of 2 seconds?

  2. physics

    a car has a mass of 820 kg. It starts from rest and travels 41 m in 3.0s. What is the net force applied to the car?

  3. physics

    A car of mass 1200 kg starts from rest, accelerates uniformly to a speed of 4.0 m/s in 2.0 s and continues moving at this constant speed in a horizontal straight line for an additional 10 s. The brakes are then applied and the car

  4. Physics

    Steel Phantom is a roller coaster in Pennsylvania that, like the Desperado in Nevada, has a vertical drop of 68.6m Suppose a roller-coaster car with a mass of 1000 kg travels from the top of that drop without friction. The car

You can view more similar questions or ask a new question.