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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. If the momentum of a body is increased n times, its kinetic energy increases

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2. If the K.E. of a particle is doubled, then its momentum will . [CPMT 2003: Kera]

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3. A body of mass m kg is lifted by a man to a height of one metre in 30 sec. Another man lifts the same mass to the same height in 60 sec. The work done by them are in the ratio. [MP PMT 1993]

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4. If force and displacement of particle in direction of force are doubled. Work would be. [AFMC 2002]

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5. Two bodies of masses m and 2m have same momentum. Their respective kinetic energies E1 and E2 are in the ratio . [MP PET 1997; KC]

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