Explain the work done by a varible force.

Prove that change in kinetic energy of a paticle is equal to the work done on it by a variable force.

Give the expression for work done by a variable force.

Represent work done on a body by a variable force, graphically.

A raindrop of radius r falls from a certain height h above the ground. The work done by the gravitational force is proportional to :

A body of mass 2 kg initially at rest moves under the action of an applied horizontal force of 7N on a table with coefficient of kinetic friction = 0.1 . Compute the Work done by the applied force in 10s.

The sign of work done by a force on a body is important to understand. State carefully if the following quantities are positive or negative : Work done by an applied force on a body moving on a rough horizontal plane with uniform velocity.

Certain force acting on a 20 kg mass changes its velocity from 5 ms^(-1) to 2 ms^(1) . Calculate the work done by the force.