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Work and Energy, Conceptual Questions

See here answers to the conceptual questions of Work and Energy included in the Physics course for grade 11.

Question 1 A bucket is taken to the bottom of a well, does the bucket possess any P.E. Explain.
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Question 2 When an arrow is shot from its bow, it has K.E. From where does it get the K.E?
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Question 3 Does a hydrogen filled balloon possess any P.E? Explain.
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Question 4 Is K.E a vector quantity?
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Question 5 What happens to K.E of a bullet when it penetrates into the target?
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Question 6 Does the tension in the string of a swinging pendulum do any work? Explain.
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Question 7 A meteor when enters into the earth’s atmosphere burns. What happens to its energy?
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Question 8 What type of energy is stored in the spring of watch?
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Question 9 A man drops a cup from a certain height, which breaks into pieces. What energy changes are involved?
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Question 10 A man rowing boat upstream is at rest with respect to shore, is he doing work?
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Question 11 Why energy savers are used instead of normal bulbs?
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