Answer Happy

Name: . Lab 12 - The Case of the Happy & Sad Balls Pre-Lab Worksheet Review Physics Concepts: Before you attempt this particular experiment and work through the required calculations you will need to review the following physics concepts and definitions. Conservation of Energy • Conservation of Mechanical Energy Momentum • Impulse Collisions Pre-Lab Questions (continued on the next page): 1. A ball is dropped from height "H" above the table. Draw a diagram and determine algebraically the velocity of the ball just before it hits the table (in terms of H and any other parameters you need). Use upward as the positive direction. (Hint: Consider mechanical energy conservation and assume no air resistance.) . . Copy your final equation into step 7a of the lab. 2. A ball bounces up from the table to a height "D" Draw a diagram and determine algebraically the velocity of the ball just after it left the table (in terms of D and any other parameters you need). Use upward as the positive direction. (Hint: Consider mechanical energy (ME) conservation and assume no air resistance. Do not assume the ME is the same value as in problem 1.) Copy your final equation into step 7b of the lab.