NEET Physics Work, Energy, and Power MCQs

A block of mass 2 kg is pulled up a rough inclined plane of inclination $30^\circ$ with a constant force $F$ parallel to the incline. The coefficient of kinetic friction between the block and the plane is 0.2. If the block moves with a constant speed of 2 m/s, the power delivered by the force $F$ is:

A block of mass m is released from rest at the top of a smooth curved track of height h. It then enters a rough horizontal section with a coefficient of kinetic friction μ. What is the distance the block travels on the rough section before coming to rest?

A small block of mass $m$ is placed on top of a larger block of mass $M$. The coefficient of static friction between the blocks is $\mu_s$. The larger block rests on a frictionless horizontal surface. What is the maximum horizontal force that can be applied to the larger block so that the smaller block does not slip?

A block of mass 2 kg is pulled along a rough horizontal surface by a constant force of 10 N acting at an angle of 60° with the horizontal. If the block moves 5 m and the coefficient of kinetic friction is 0.2, what is the net work done on the block?

A block of mass m is pushed up a rough inclined plane of angle $heta$ and coefficient of kinetic friction $\mu_k$ by a constant horizontal force F. The block moves a distance d along the incline. Which expression gives the net work done on the block?

A car is moving with constant speed on a banked curved road, inclined at an angle $heta$. If the coefficient of static friction between the tires and the road is $\mu_s$, what are the maximum and minimum speeds the car can have without skidding?

A block is pulled along a rough horizontal surface by a constant force of 15 N acting at an angle of 30° above the horizontal. If the block is displaced by 5 m, and the frictional force is 5 N, what is the net work done on the block?

A block of mass 2 kg is pulled along a rough horizontal surface by a variable force $F = (4 + 2x)$ N, where $x$ is the displacement in meters. If the coefficient of kinetic friction is 0.2, what is the work done by the net force when the block is displaced by 5 m?

A small object placed on a rotating horizontal turn table just slips when it is placed at a distance of 4 cm from the axis of rotation, if the angular velocity of the turn table is doubled the object slips when its distance from the axis of rotation is

A circular road of radius 1000 m has banking angle ${45^0}$. The maximum safe speed of a car having mass 2000 kg will be, if the coefficient of friction between tyre and road is 0.5