# physics

posted by
**tom** on
.

A 1580 kg car is traveling with a speed of 15.0 m/s. What is the magnitude of the horizontal net force that is required to bring the car to a halt in a distance of 50.0 m?

Calculate the kinetic energy:

E_{k} = 1/2 m v^2

Then use that The work performed by the force must dissipate the kinetic energy. The performed work is force times the distance of 50 m. So, you equate that to E_{k} and solve for the force.

3560 n