1. What is momentum? State the law of conservation of momentum. 2. Suppose a cart A with mass m1 traveling with a velocity vi1 collided with another cart B of mass m2 moving with velocity vi2. After collision velocities for the carts A and B changed to vf1 and vf2 respectively. a. What is the initial momentum of the system? b. What is the final momentum of the system? 3. If a car of mass 10kg is moving with a velocity of 5m/s, what is the initial momentum of this car? 4. This car collide with another car of equal mass parked in a parking lot. What is the final momentum of the system? 5. What is an elastic collision? How does it differ from an inelastic collision?