Question

A 1300kg car runs into the rear of a 1700-kg minivan that was
moving at 5m/s. The two vehicles are locked together after the
collision and move with a speed of 10m/s.

a) What was the speed of the car before the collision?
b) How much kinetic energy is lost in the collision?
c) How high above the ground would the locked-together vehicles
have to be raised in order for their potential energy to equal the
‘’lost kinetic energy in the collision?
d) How much work would it take to raise the vehicles to that
height?