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physics objective Questions and Answers with explanation and solutions

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Physics - Work Energy power and collision Questions and Answer >>

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1. A spring of force constant 10 N/m has an initial stretch 0.20 m. In changing the stretch to 0.25 m, the increase in potential energy is about. [CPMT 1977]

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2. If the stone is thrown up vertically and return to ground, its potential energy is maximum. [EAMCET 1979]

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3. A man starts walking from a point on the surface of earth (assumed smooth) and reaches diagonally opposite point. What is the work done by him . [DCE 2004]

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4. A 50kg man with 20kg load on his head climbs up 20 steps of 0.25m height each. The work done in climbing is . [JIPMER 2002]

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5. The kinetic energy acquired by a body of mass m is travelling some distance s, starting from rest under the actions of a constant force, is directly proportional to . [Pb. PET 2000]

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