Q. If a force of 15 N is applied to move an object 3 m, what is the work done? (2023)
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A.
45 J
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B.
30 J
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C.
60 J
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D.
15 J
Solution
Work Done (W) = Force * Distance = 15 N * 3 m = 45 J
Correct Answer: A — 45 J
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Q. If a machine does 200 J of work in 10 seconds, what is its power? (2022)
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A.
20 W
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B.
10 W
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C.
30 W
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D.
40 W
Solution
Power (P) = Work / Time = 200 J / 10 s = 20 W
Correct Answer: A — 20 W
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Q. If a machine does 200 J of work in 5 seconds, what is its power? (2022)
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A.
40 W
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B.
50 W
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C.
20 W
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D.
30 W
Solution
Power (P) = Work Done (W) / Time (t) = 200 J / 5 s = 40 W
Correct Answer: B — 50 W
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Q. If a machine does 2000 J of work in 5 seconds, what is its power? (2022)
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A.
400 W
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B.
200 W
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C.
100 W
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D.
500 W
Solution
Power (P) = Work Done / Time = 2000 J / 5 s = 400 W
Correct Answer: A — 400 W
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Q. What is the work done when a force of 15 N moves an object 3 m in the direction of the force? (2021)
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A.
45 J
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B.
30 J
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C.
15 J
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D.
60 J
Solution
Work Done (W) = Force * Distance = 15 N * 3 m = 45 J.
Correct Answer: A — 45 J
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