Question

Question 16
An object of mass, m is moving with a constant velocity, v. how much work should be done on the object in order to bring the object to rest?

Answer 1

Kinetic energy of an object of mass, moving with a velocity, v is given by the expression,
$E_k=\frac{1}{2}m{v}^2$
To bring the object to rest, $\frac{1}{2}m{v}^2$ amount of work is required to be done on the object.