1. Explain in full the difference between elastic, inelastic, and perfectly inelastic collisions. 2. A ball of mass 0.156 kg is dropped from rest from a height of 1.24- m. It rebounds from the floor to reach a height of (1.975 m. \\V hat impulse was given to the ball by the floor? 3. A 12.0 kg bullet is fired into a stationary block of wood of mass 6.00 kg. The bullet imbeds into the block. The speed of the bulletpluswood combination immediately after the collision is 1.10 m/ s. \\What was the original speed of the bullet? 4. A 3.1} kg wad of sticky clay is hurled horizontally at a 22 kg wooden block initially at rest on a horizontal surface. The clay sticks to the block. After impact, the block slides [3.50 m before coming to rest. If the coefcient of friction between the block and surface is 0.640, what was the speed of the clay immediately before impact