Tuesday 12/6/16- 5.
Alyssa's pet iguana is sitting on the windowsill of a two story building. If the windowsill is exactly 3.5 m above the ground, and the iguana has a mass of exactly 10 kg, what is its potential energy? (Remember, g=9.8 m/s2 and PE = mgh.)- A. 34300 J
- B. 35 J
- C. 34.3 J
- D. 343 J
- A. 34300 J
- 6.
A 1-gallon can of paint is sitting on the top of a ladder, exactly 2 m above the ground. If its potential energy is 39.2 J, find its mass. (Use g = 9.8 m/s2 and PE = mgh.)- A. 0.2 kg
- B. 39.2 kg
- C. 2 kg
- D. 19.6 kg
- A. 0.2 kg
- 7.
A baseball player wants to hit more homeruns. As his coach, you tell him he needs to hit the ball with more kinetic energy. He could either get a bat with twice as much mass or he could swing his current bat with twice as much velocity. Assuming his accuracy stays the same, which would help him hit the ball further? Discuss- A. A more massive bat
- B. A faster swing
- C. Neither of these will make a difference
- A. A more massive bat
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