Question

A large truck and a small car traveling at the same speed have a head-on collision. The vehicle to undergo the greater change in velocity will be..?

Answer 1

This collision is known as inelastic collision.In this case, the car experiences a greater change in velocity but the change in momentum is equal.

Please refer to this link, i hope it helps you:
http://hyperphysics.phy-astr.gsu.edu/hbase/truckc.html