1. Which of the following quantities is always conserved in a collision (assuming no external forces)?

2. In a perfectly inelastic collision, the colliding bodies:

3. Two balls of equal mass undergo an elastic head-on collision. If the first ball was moving and the second was at rest, what happens after the collision?

4. In an elastic collision, which of the following is conserved?

5. A 2 kg ball moving at 3 m/s collides elastically with a stationary 1 kg ball. After the collision, the 2 kg ball moves at 1 m/s. What is the velocity of the 1 kg ball?

6. A bullet of mass 0.01 kg moving at 500 m/s embeds into a block of mass 2 kg initially at rest. What is the final velocity of the system (bullet + block)?

7. In a 2D collision, if object A moves east and object B moves north, and they stick together after colliding, what kind of collision is this?

8. A 4 kg object moving at 3 m/s collides elastically with a 2 kg object at rest. What is the velocity of the 4 kg object after collision?

9.A collision is said to be superelastic when:

10.Two bodies of masses 3 kg and 2 kg move toward each other with speeds 4 m/s and 6 m/s, respectively. What is their velocity of approach before collision?