365985 Assertion :
A disc is rolling on a rough horizontal surface. The instantaneous speed of the point of contact during perfect rolling is zero with respect to ground.
Reason :
The force of friction can help in achieving pure rolling condition.

365986 Assertion :
A sphere is performing pure rolling on a rough horizontal surface with constant angular velocity. Frictional force acting on the sphere is zero.
Reason :
Velocity of contact point is zero.

365987 For pure rolling, the relation between \(v_{P}\) and \(v_{Q}\) is:

365988 A solid sphere of mass \(m\) and radius \(\mathrm{R}\) is lying on a rough horizontal plane. A constant force \(4 \mathrm{mg}\) acts vertically at point \(\mathrm{P}\) such that \(\mathrm{OP}\) makes an angle \(60^{\circ}\) with horizontal. Find the minimum value of coefficient of friction so that sphere starts pure rolling.

365985 Assertion :
A disc is rolling on a rough horizontal surface. The instantaneous speed of the point of contact during perfect rolling is zero with respect to ground.
Reason :
The force of friction can help in achieving pure rolling condition.

365986 Assertion :
A sphere is performing pure rolling on a rough horizontal surface with constant angular velocity. Frictional force acting on the sphere is zero.
Reason :
Velocity of contact point is zero.

365987 For pure rolling, the relation between \(v_{P}\) and \(v_{Q}\) is:

365988 A solid sphere of mass \(m\) and radius \(\mathrm{R}\) is lying on a rough horizontal plane. A constant force \(4 \mathrm{mg}\) acts vertically at point \(\mathrm{P}\) such that \(\mathrm{OP}\) makes an angle \(60^{\circ}\) with horizontal. Find the minimum value of coefficient of friction so that sphere starts pure rolling.

365985 Assertion :
A disc is rolling on a rough horizontal surface. The instantaneous speed of the point of contact during perfect rolling is zero with respect to ground.
Reason :
The force of friction can help in achieving pure rolling condition.

365986 Assertion :
A sphere is performing pure rolling on a rough horizontal surface with constant angular velocity. Frictional force acting on the sphere is zero.
Reason :
Velocity of contact point is zero.

365987 For pure rolling, the relation between \(v_{P}\) and \(v_{Q}\) is:

365988 A solid sphere of mass \(m\) and radius \(\mathrm{R}\) is lying on a rough horizontal plane. A constant force \(4 \mathrm{mg}\) acts vertically at point \(\mathrm{P}\) such that \(\mathrm{OP}\) makes an angle \(60^{\circ}\) with horizontal. Find the minimum value of coefficient of friction so that sphere starts pure rolling.

365985 Assertion :
A disc is rolling on a rough horizontal surface. The instantaneous speed of the point of contact during perfect rolling is zero with respect to ground.
Reason :
The force of friction can help in achieving pure rolling condition.

365986 Assertion :
A sphere is performing pure rolling on a rough horizontal surface with constant angular velocity. Frictional force acting on the sphere is zero.
Reason :
Velocity of contact point is zero.

365987 For pure rolling, the relation between \(v_{P}\) and \(v_{Q}\) is:

365988 A solid sphere of mass \(m\) and radius \(\mathrm{R}\) is lying on a rough horizontal plane. A constant force \(4 \mathrm{mg}\) acts vertically at point \(\mathrm{P}\) such that \(\mathrm{OP}\) makes an angle \(60^{\circ}\) with horizontal. Find the minimum value of coefficient of friction so that sphere starts pure rolling.