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Mechanics
Easy
Question
- The time until rolling begins
- The displacement of the disc until rolling begins
- The velocity when rolling begins
- The work done by the force of friction
The correct answers are: The velocity when rolling begins, The work done by the force of friction
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4
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A uniform disc of mass m and radius R is rolling up a rough inclined plane which makes an angle of 30o with the horizontal. If the coefficients of static and kinetic friction are each equal to and the only forces acting are gravitational and frictional, then value of for maximum magnitude of the frictional force acting on the disc is
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S2: A particle may have angular momentum even though the particle is not moving in a circle.
S3: A ring of rolling without sliding on a fixed surface. the centripetal acceleration of each particle with respect to the centre of the ring is same.
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An equilateral triangle ABC formed a uniform wire has two small identical beads initially located at A. The triangle is set rotating about the vertical axis AO. Then the beads are released from rest simultaneously and allowed to slide down, one along Ab and other AC as shown. Neglecting frictional effects, the quantities that are conserved as beads slides down are:
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