state work energy theorem. derive it for constant force.
We know that according to the third equation of motion,
Multiplying both sides by m/2, we obtain
= Final kinetic energy
= Initial kinetic energy
W = FS = Work done
Equation (i) is a special case of work energy (WE) theorem. The change in kinetic energy of a particle is equal to the work done on it by the net force.
Work is said to be done when the point of application of the forces moves in the direction of the force.
If a constant force is applied on a body and the body has a displacement in the direction of the force as shown in fig, then the work done on the body by the force is given by,
When the displacement