A wooden chair is dragged on the level floor and brought to the same place. Let the distance covered be `s` and frictional force acted on the chair by the floor be `f `. What is the work done by the frictional force ?

A body of mass 0.3 kg is taken up an inclined plane of length 10 m and height 5 m and then allowed to slide down to the bottom again. Coefficient of friction between the body and the plane is 0.15. What is the Work done against the frictional force over the round trip?

A body of mass 0.3 kg is taken up an inclined plane of length 10 m and height 5 m and then allowed to slide down to the bottom again. Coefficient of friction between the body and the plane is 0.15. What is the Work done by the gravitational force over the round trip?

A body of mass 0.3 kg is taken up an inclined plane of length 10 m and height 5 m and then allowed to slide down to the bottom again. Coefficient of friction between the body and the plane is 0.15. What is the Work done by the applied force over the upward journey?

A car of mass 1500 kg is moving with a speed of 12.5 m cdot s^(-1) on a circular path of radius 20 m on a level road. What should be the frictional force between the car and the road so that the car does not slip? What should be the value of the coefficient of friction this force?

A body of mass m is rotated along a circular path of radius r with uniform speed v. Centripetal force acting on the body is (mv^(2))/(r ) . If the body travels through a semicircular path, then what will be the work done by the centripetal force?