The total work done on a particle is equal to the change in its kinetic energy

When the force retards the motion of a body, the work done by the force is

A body moves a distance of 10 m along a straight line under the action of a force of 5 N. If the  work done is 25 J, the angle which the force makes with the direction of motion of the body is

A particle moves along the x - axis from x = 0 to  x= 5m, under the influence of a force given by F = 7 -2x + 3x². The work done in the process is

When work done by force of gravity is negative

When work done by a force on a particle is positive Kinetic energy may increase

An object of mass m is tied to a string of length L and a variable horizontal force is applied on it which starts at zero and gradually increases until the string makes an angle θ with the vertical .  Work done by the force F is

A chain is held on a frictionless table with one third of its length hanging over the edge. If the chain has a length L and mass M, how much work is required to pull the hanging part back on the table

A person pulls a bucket of water from a well of depth h. If the mass of uniform rope is m and that of the bucket full of water M, the work done by the person is

A cord is used to lower vertically a block of mass M a distance d at a constant downward acceleration of g/4. Then the work done by the cord on the block is