Question

An object of mass m is moving with a constant velocity v. flow much work should be done on the object in order to bring the object to rest?

Answer 1

Mass of the object = m, Velocity of the object = v, Kinetic energy = 1/2mv². 

The work done to bring the object to rest is stored in the from of kinetic energy. 

∴ Work done = 1/2mv² .