SSC
PHYSICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Saqib uses a wheelbarrow to move soil into his garden. He exerts an average force of 165 N while pushing the wheelbarrow and does 6.4 J of work during each load. How far is he moving the soil during each load?
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39 m
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26 m
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0.039 m
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0.026 m
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Explanation:
Detailed explanation-1: -(a) In the case of the wheelbarrow, the output force or load is between the pivot and the input force. The pivot is the wheel’s axle. Here, the output force is greater than the input force. Thus, a wheelbarrow enables you to lift much heavier loads than you could with your body alone.
Detailed explanation-2: -Pushing is normally preferred as it is ergonomically favourable and the handles less likely to slip from your hands. The forces involved in moving a wheelbarrow over soft ground are more complex, involving a rotational force to lift the wheel over, or through, mud and gravel.
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