A particle of mass m is moving in a horizontal circle of radius R with uniform speed v. When it moves from one point to a diametrically opposite point its

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Circular Motion Practice Q & A
Q:45

kinetic energy changes by Mv²/4

momentum does not change

momentum changes by 2 Mv²

kinetic energy changes by Mv²

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A particle rests on the top of a hemisphere of radius R. The smallest horizontal velocity that must be imparted to the particle if it is to leave the hemisphere without sliding down is

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