A 5 kg mass moving with the speed 5 m/s collides with 4 kg mass moving with the speed 8 m/s as shown on the diagram below. After the collision, the two masses stick together and mov with velocity u. Find u.

a.   A ball of sticky wax has a mass of 0.25 kg and a velocity of 12 m/s right before it collides with the floor. It just crushes into the floor and sticks with a velocity of zero. What is the change in momentum of this ball of wax? b.   A rubber bounce ball has mass of 0.25 kg and velocity 12 m/s down right before it collides with the floor. Its velocity right after finishing the collision with the floor ( bounces off ) is 8 m/s up. What is the change in momentum of the rubber ball?

1. What are the equations for linear momentump and kinetic energy K? Please define the variables. 2. Please define concisely and in your own words the concept of conservation. Describe conservation of momentum and kinetic energy. 3. Briefly describe the difference between elastic and inelastic collisions and give an example of each. Describe these collisions in terms of the kinetic energy and momentum. 4. A moving object collides with and sticks to a stationary object. Do the combined objects move slower, faster or at the same speed as the original moving object? 5. What is the expected value of the ratio of the final and initial momenta, pf/p; ?

Please