Physics Exam Prep
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Physics Exam Prep
This section covers the work-energy principle, definitions of work, and calculations involving forces and displacements. Key concepts include how to calculate work done by forces, understanding positive and negative work...
Sample questions with model answers
Every question in the paper gets a full exam-length answer in the app — organised by marks, the way a topper writes it.
A body constrained to move in y-direction is subjected to a force given by, F = (-2i + 15j + 6k) N. The work done by this force in moving the body a distance of 10 m along the y-axis is.
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150 J
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A man pushes a wall and fails to displace it. He does
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no work at all
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A uniform chain has mass M and length L and it is lying on a smooth horizontal table with half of its length hanging vertically down. The work done in pulling the chain up the table is.
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MgL/4
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A position dependent force F is acting on a particle and its force-position curve is shown in the figure. Work done on the particle, when its displacement is from 0 to 5 m is.
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25 J
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