KINETIC ENERGY

If a body of mass m starts from initial velocity u and is accelerated by a constant force F to velocity of v then from the laws of motion under constant acceleration, v² = u² + 2 a s and the definition of force F = m a, then the work done is equal to F * s.

Notes:

• If the body starts from rest, u =0 and so the work done on it would be ¹/ ₂m v². This gives the amount of energy that any moving body of mass m traveling at velocity v has.