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Factors Affecting Friction

For rolling m...

Question

For rolling motion force of friction is necessary , if the force of friction becomes zero when perfect rolling begins , which force will provide the torque for further rolling

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Solution

Dear student, The body keeps moving due to the inertia of rotation, this inertia of the rolling hlbody gives necessary torque. Regards

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Q. Assertion :Friction is necessary for a body to roll on the surface. Reason: Friction provides the necessary tangential force and torque.

Q. Statement 1: A wheel moving down frictionless inclined plane will slip and not roll on the plane.
Statement 2: It is the frictional force which provides a torque necessary for a body to roll on a surface.

Read each statement below carefully, and state, with reasons, if it is true or false;

(a) During rolling, the force of friction acts in the same direction as the direction of motion of the CM of the body.

(b) The instantaneous speed of the point of contact during rolling is zero.

(c) The instantaneous acceleration of the point of contact during rolling is zero.

(d) For perfect rolling motion, work done against friction is zero.

(e) A wheel moving down a perfectly frictionless inclined plane will undergo slipping (not rolling) motion.

Q. A ring of mass m and radius is acted upon by a force F as shown in the figure. There is sufficient friction between the ring and ground. The force of friction force necessary for pure rolling is:

Q. A ring of mass m and radius R is acted upon by a force F as shown in the figure, there is sufficient friction between the ring and the group then the force of friction force necessary for pure rolling is

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