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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 body moves a distance of 10 m along a straight line under the action of a force of 5 N. If the work done is 25 joules, the angle which the force makes with the direction of motion of the body is . [CBSE PMT 1999;R]

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2. Two masses of 1kg and 16kg are moving with equal K.E. The ratio of magnitude of the linear momentum is . [AIEEE 2002]

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3. A spring of spring constant 5 ´ 103 N/m is stretched initially by 5cm from the unstretched position. Then the work required to stretch it further by another is . [AIEEE 2003]

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4. A ball is released from the top of a tower. The ratio of work done by force of gravity in first, second and third second of the motion of the ball is . [Kerala PET 2005]

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5. A body of mass 10 kg is dropped to the ground from a height of 10 metres. The work done by the gravitational force is (g = 9.8) . [SCRA 1994]

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