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Physics

Mechanics

Easy

Question

A solid cylinder is rolling down the inclined plane without slipping. Which of the following is/are correct

The friction force is dissipative
The friction force is necessarily changing
The friction force will aid rotation but opposes translation
The friction force is reduced if is reduced

The correct answers are: The friction force will aid rotation but opposes translation, The friction force is reduced if is reduced

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A disc of mass m and radius r is placed on a rough horizontal surface. A cue of mass m hits the disc at a height h from the axis passing through centre and parallel to the surface. The disc will start pure rolling for

A disc of mass m and radius r is placed on a rough horizontal surface. A cue of mass m hits the disc at a height h from the axis passing through centre and parallel to the surface. The disc will start pure rolling for

PhysicsMechanics

$text A square plate hinged at end text A text , of side a and mass end text M text is placed in end text left parenthesis x minus z right parenthesis text plane. The plate is allowed end text text to fall upto end text left parenthesis x minus y right parenthesis text plane. Find its angular velocity. end text$ 4

$text A square plate hinged at end text A text , of side a and mass end text M text is placed in end text left parenthesis x minus z right parenthesis text plane. The plate is allowed end text text to fall upto end text left parenthesis x minus y right parenthesis text plane. Find its angular velocity. end text$ 4

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On a particle moving on a circular path with a constant speed $nu$ , light is thrown from a projectors placed at the centre of the circular path. The shadow of the particle is formed on the wall. The velocity of shadow up the wall is

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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 30^o 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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A uniform rod of length L (in between the supports) and mass m is placed on two supports A and B. The rod breaks suddenly at length L/10 from the support B. Find the reaction at support A immediately after the rod breaks.

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Consider the following statements:
S₁ : Zero net torque on a body means always absence of rotational motion of the body.
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.
State in order, whether $s subscript 1 comma s subscript 2 comma s subscript 3$ are true or false.

Consider the following statements:
S₁ : Zero net torque on a body means always absence of rotational motion of the body.
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.
State in order, whether $s subscript 1 comma s subscript 2 comma s subscript 3$ are true or false.

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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:

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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A particle moves in a circular path with decreasing speed. Choose the correct statement

A particle moves in a circular path with decreasing speed. Choose the correct statement

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