Download Energy Quiz - Lisle CUSD 202

Work and Energy Problems
1. A stinky sock is hanging from the ceiling. It is 10 meters above the ground and has a mass of
0.10 kg. What is its potential energy? If the sock has a KE of 7.056J, how fast is the sock
traveling?
2. A superball is dropped from a 2-meter height. It's a big one and has a mass of 0.5 kg. What is
its potential energy before it is dropped? If it travels at .18m/s, what is the KE of the superball?
3. What is the maximum kinetic energy of the same superball the moment before it hit's the
ground? Assume no energy loss. What is the KE of the ball at its highest point?
4. What is the maximum velocity of the same superball the moment before it hit's the ground?
Assume no energy loss. If the ball is rolling across the table rather than being bounced through
the air, explain how you energy pie chart would change.
5. The same superball loses some energy after it hits the ground and bounces. It only bounces
back to a height of 1.5 meters. How much energy was converted into heat and sound? Draw
this in the form of an energy pie chart.
6. A superball is dropped from 1m. The ball has a mass of 0.56kg. What is the potential energy
of the ball? If the ball is moving at 3.5 m/s what is the KE of the ball?
7. The potential energy of the superball is known (8.232J). If it is dropped form 2 m, what is the
mass of the superball? You also know the KE of the ball is 10.5 J, what is the velocity of the
ball?