Question

A 0.2kg toy car rolls down a ramp with a height of 0.7m. What is the speed of the car at the bottom of the ramp. At the bottom it hits a stationary car with a mass of .4 kg. The two cars have velcro bumpers and stick together. At what speed do the two cars move after the collision?

Answer 1

V = √(2 g h)

momentum is conserved
... .2 * V = (.2 + .4) v

Answer 2

Thank you