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

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

As shown in the figure , the friction force acting on the block is

The block of mass 'm' initially at x=0 is acted upon by a horizontal force F=a-bx as shown in the figure. The coefficient of friction between the surfaces of contact is mu . The net work done on the block is zero if the block travels a distance of ________ .

A mass m rests under the action of a force F as shown in the figure-2.158 on a horizontal surface. The coefficient of friction between the mass and the surface is mu . The force of friction between the mass and the surface is :

A solid sphere of mass M and radius R is pulled by a force F as shown in figure . If the sphere does not slip over the surface , then frictional force acting on the sphere is

A solid sphere of mass M and radius R is pulled by a force F as shown in figure . If the sphere does not slip over the surface , then frictional force acting on the sphere is

A disc of radius R and mass M is under pure rolling under the action of a force F applied at the topmost point as shown in figure. There is sufficient friciton between the disc and the horizontal surface. The acceleration is given as

A disc of radius R and mass M is under pure rolling under the action of a force F applied at the topmost point as shown in figure. There is sufficient friciton between the disc and the horizontal surface. The acceleration is given as

A disc of mass m and radius R is placed over a plank of same mass m. There is sufficient friction between disc and plank to prevent slipping. A force F is applied at the centre of the disc. Force of friction between the disc and the plank is

A disc of mass m and radius R is placed over a plank of same mass m. There is sufficient friction between disc and plank to prevent slipping. A force F is applied at the centre of the disc. Force of friction between the disc and the plank is