How much work is done in lifting a body of mass 6kg and relative density 3 lying in the bed of a lake of depth 5m
1) 30J 2) 60J 3) 200J 4)300J

How much force is applied on the body when 780 J of work is done in displacing the body through a distance of 30 m in the direction of force?

If 250 J of work is done in sliding a 5 kg block up an inclined plane of height 4 m. Work done against friction is (g=10ms^(-2))

If 250 J of work is done in sliding a 5 kg block up an inclined plane of height 4 m. Work done against friction is (g=10ms^(-2))

A body of mass 2kg at rest is supplied constant power 1J/sec, the distance travelled by body after 6 sec is

Calculate the height through which a body of mass 0.5 kg is lifted if the energy spent in doing so is 10j . Take g = 10 m s^(-2)

300J of work is done in slinding a 2 kg block up an inclined plane of height 10m. Taking g = 10m//s^(2) , work done against friction is

A cord of negligible mass is wound round the rin of a flywheel of mass 20 kg and radius 20 cm. A steady pull of 25 N is applied on the cord. The work done by the pull when 2 m of the cord is unwound is a) 20 J b) 25 J c) 45 J d) 50 J

A Force F acting on an object varies with distance x as shown in the figure . The force is in newton and x in metre. The work done by the force in moving the object from x = 0 to x = 6m is (a) 4.5 J (b) 13.5 J (c) 9.0 J (d) 18.0 J

500 J of work is done in sliding a 4 kg block up along a rough inclined plane to a vertical height of 10 m slowly. The work done against friction is (g = 10 m/s^2)

A body of mass 2 kg is moving under the influence of a central force whose potential energy is given by U = 2r^(3) J . If the body is moving in a circular orbit of 5 m , its energy will be a) 625 J b) 250 J c) 500 J d) 125 J