A 0.180-kg round puck is placed inside a horizontal spring-loaded launcher placed on a friction less surface. The spring is released and the puck leaves the launcher with2.50 J of

kinetic energy, and slides across the friction less surface until it strikes a 0.300-kgsquare block at rest on the surface. 1. What was the puck's velocity just before striking the block? 2. What was the puck's momentum just before striking the block? 3. After striking the block, the puck bounces backwards with a velocity of – 1.10 m/s.What is its momentum after this collision? Don't forget about the sign. (You don't know if the collision is elastic.) 4. What, then, is the momentum of the block after the collision? 5. What is the velocity of the block after the collision? Again, remember that you don't know if the collision is elastic.