Find total work done by friction assuming plank is sufficiently long.

Solve this question in both ground frame and C-frame.

find total W.D by fricition assuming plank is sufficiently long.

Work done by friction on a body moving on plain ground ……………

Assertion : It is possible that work done by a force on an object is different for different observes . Reason : Work done by a force depends on frame of reference of observer .

A block of 1 kg is kept on a rough surface of an elevator moving up with constant velocity of 5 m/s. In 10 second work done by normal reaction (no sliding on incline surface) (i) from ground frame is 320 J (ii) is equal to work done by friction force in elevator frame (iii) is equal to work done by friction in ground frame

A small disc of mass m slides down a smooth hill of height h without initial velocity and gets onto a plank of mass M lying on the horizontal plane at the base of the hill. (figure). Due to friction between the disc and the plank the disc slows down and, beginning with a certain moment, moves in one piece with the plank. (1) Find the total work performed by the friction forces in this process. (2) Can it be stated that the result of obtained does not depend on the choice of the reference frame?

A small disc of mass m slides down a smooth hill of height h without initial velocity and gets onto a plank of mass M lying on the horizontal plane at the base of the hill. (figure). Due to friction between the disc and the plank the disc slows down and, beginning with a certain moment, moves in one piece with the plank. (1) Find the total work performed by the friction forces in this process. (2) Can it be stated that the result of obtained does not depend on the choice of the reference frame?

Block A of mass m is placed over a wedge of same mass m. Both the block and wedge are placed on a fixed inclined plane. Assuming all surfaces to be smooth calculate the displacement of the block A in ground frame in 1s .

Figure shows a pendulum suspended from the roof of a car that has a constant acceleration a relative to the ground. Find the deflection of the pendulum from the vertical as observed from the ground frame and from the frame attached with the car.

An equilateral triangular frame with side a carrying a current I is placed at a distance a from an infinitely long straight wire carrying a current I as shown in the figure. One side of the frame isparallel to the wire. The whole system lies in the xy-plane. Find the magnetic force F acting on the frame.

An equilateral triangular frame with side a carrying a current I is placed at a distance a from an infinitely long straight wire carrying a current I as shown in the figure. One side of the frame isparallel to the wire. The whole system lies in the xy-plane. Find the magnetic force F acting on the frame.