2. Define the term impulse.
4. Using the principle of momentum conservation, explain what happens when a moving billiard ball collides with a stationary ball (cue ball hitting the eight ball).
6. Explain the difference between energy and power and how they are related to work. Give examples of each.
8. A 1000 kilogram car is lifted 1 meter.
   2. What is the potential energy with respect to the floor?
   4. If the car is lifted 2 meters high, what is the new value of potential energy with respect to the floor?
   6. 
      
9.  
10.