Post a New Question

physics

posted by .

A car of mass 1000kg moving with a velocity of 36km/h hits a wall and comes to rest in 5s.find the force and work done by the car on the wall.

  • physics -

    36 km/h = 36000m/3600 s = 10 m/s
    Car's initial momentum = 10^3*10
    = 10^4 kg*m/s
    Divide that by the stopping time (5 s) to get the average force, in newtons.

    The "work done by the car" is the initial kinetic energy of the car,
    (1/2)MVo^2 = 5*10^4 J,
    but it is mostly converted to heat and inelastic damage distortion of the wall and the car itself.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

More Related Questions

Post a New Question