Physics
WAEC 2021
The handle of a screw jack is 35 cm long and pitch of the screw is 0.5 cm. What force must be applied at the end of the handle to lift a load of 2000N, if the efficiency of the jack is 30% [π = 22/7]?
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A.
152.0N
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B.
132.0N
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C.
15.2N
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D.
440.0N
Correct Answer: Option C
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