MEDIUM
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IMPORTANT
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A wheel is rolling along the ground with a speed of . The magnitude of the linear velocity of the points at the extremities of the horizontal diameter of the wheel is equal to:
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Important Questions on Rotational Mechanics
HARD
NEET
IMPORTANT
If rotational kinetic energy is of total kinetic energy then the body will be:-
HARD
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IMPORTANT
A ball rolls without slipping. The radius of gyration of the ball about an axis passing through its centre of mass is If radius of the ball be then the fraction of total energy associated with its rotational energy will be
HARD
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IMPORTANT
If the angular velocity of a body rotating about an axis is doubled and its moment of inertia halved, the rotational kinetic energy will be changed by a factor of :-
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IMPORTANT
If a sphere is rolling, the ratio of its rotational energy to the total kinetic energy is given by :
EASY
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A person, with outstretched arms, is spinning on a rotating stool. He suddenly brings his arms down to his sides. Which of the following is true about his kinetic energy and angular moment
HARD
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IMPORTANT
A uniform thin ring of mass rolls without slipping on a horizontal surface with a linear velocity of . The kinetic energy of the ring is:-
HARD
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IMPORTANT
A body is rotating with angular momentum . If is its moment of inertia about the axis of rotation, its kinetic energy of rotation is:-
HARD
NEET
IMPORTANT
A disc rolls down a plane of length and is inclined at angle , without slipping. Its velocity on reaching the bottom will be:-
