Consider two bodies, A and B, moving in the same direction with the same kinetic energy. A has a mass twice that of B. If the same retarding force is applied to each, how will the stopping distances of the bodies compare?

Answer 1

(Force)*(stopping distance)
= (work done against the force)
= (initial kinetic energy)

Since the kinetic energies and forces are the same for the two different masses, the stopping distances are the same.