Let’s see how much you’ve picked up with these experiments and the reading – answer as best as you can. (No peeking at the answers until you’re done!) Just relax and see what jumps to mind when you read the question. You can also print these out and jot down your answers in your science notebook.
Some of these questions you might recognize from the last lesson on potential energy, but we put them here again so you can see how they are inter-related. Have fun!
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1. What is potential energy?
2. What is kinetic energy?
3. What is gravitational potential energy?
4. What does transfer of energy mean?
5. What is conservation of energy?
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6. Describe the potential and kinetic energy of this roller coaster:
7. Where is the potential energy greatest?
8. Where is the kinetic energy greatest?
9. Where is potential energy lowest?
10. Where is kinetic energy lowest?
11. Where is KE increasing, and PE is decreasing?
12. Where is PE increasing and KE decreasing?
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13. What’s energy efficiency?
14. Which is more energy efficient, a nice new Hot Wheel car or one that’s been stepped on?
15. In most systems, where are the most common two sources of non-useful energy?
16. What is work?
17. What does a Newton measure?
18. What does a Joule measure?
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For Advanced Students:
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Gravitational Potential Energy PE=mgh: m is mass, g is 10m/s2 (32 ft/s2), and h is height.
19. Timmy is sitting 3 m (9 feet) up in a tree holding a 1 kg (about 2 pound) snowball. What’s the gravitational potential energy of the snowball?
20. Susie is now standing under the tree. The distance between the snow ball and the top of Susie’s head is 2m. What’s the potential energy of the snow ball if it was to be dropped on Susie’s head?
21. What is the kinetic energy that the snowball has just before it hits Susie?
(No math needed here, just think about it for a second.)
Kinetic energy = 1/2 mv2 m is mass and v is velocity.
22. What is the kinetic energy of a 680 kg (1300 lb.) car traveling at 13 m/s (30 mph)?
23. What is the kinetic energy of a 680 kg car traveling at 26 m/s (60 mph)
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Need answers?
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