MEDIUM
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IMPORTANT
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If torque acting upon a system is zero, the quantity that remains constant is
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Important Questions on System of Particles and Rotational Motion
EASY
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IMPORTANT
A constant torque acting on a uniform circular wheel changes its angular momentum from to in second. the magnitude of this torque is:
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IMPORTANT
A uniform rod of mass and length is suspended by two strings at its ends as shown. When one of the strings is cut, the rod starts falling with an initial angular acceleration
HARD
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IMPORTANT
A solid sphere, a spherical shell, a ring and a disc of same radius and mass are allowed to roll down an inclined plane without slipping. The one which reaches the bottom first is
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When a body is rolling without slipping on a rough horizontal surface, the work done by 'friction is
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A solid spherical ball is rolling without slipping down an inclined plane. The fraction of its total energy associated with rotation is
HARD
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A solid cylinder of mass M and radius R rolls down the inclined plane from height h without slipping. The speed of its centre of mass when it reaches the bottom is:
HARD
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An inclined -plane makes an angle of with the horizontal. A solid sphere rolling down this inclined plane from rest without slipping has a linear acceleration equal to
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An object slides down a smooth incline and reaches the bottom with velocity . If same mass is in the form of a ring and it rolls down an inclined plane of same height and angle of inclination, then its velocity at the bottom of inclined plane will be
