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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 particle moves in a straight line with retardation proportional to its displacement. Its loss of kinetic energy for any displacement x is proportional to . [AIEEE 2004]


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2. When work is done on a body by an external force, its


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3. If the unit of force and length each be increased by four times, then the unit of energy is increased by . [CPMT 1987]


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4. The decrease in the potential energy of a ball of mass 20 kg which falls from a height of 50 cm is. [AIIMS 1997]


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5. A man pushes a wall and fails to displace it. He does . [CPMT 1992]


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