Question

A 1560 kg car is traveling with a speed of 14.5 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 53.3 m?

Answer 1

The force must do negative work (i.e., have work none on it) that equals the initial kinetic energy.

F*53.3 = (M/2)*Vo^2 = 1.64*10^5 J

F = 3080 Newtons