For a movie stunt, an empty truck with a mass of 2000 kg goes 10 m/s and runs into a stopped car of mass 1000 kg. The truck then keeps moving and pushes the car along with it.
Answer
T
The collision is perfectly elastic.
K
Kinetic energy stays the same.
T
The momentum after the collision is greater than the momentum before the collision.
T
The speed of the combined vehicles is less than the initial speed of the truck.