Question

The kinetic energy of a moving object is equal to the work required to bring it to its speed from rest, or the work the object can do while being brought to rest.

Answer 1

The kinetic energy of a moving object is equal to the work necessary to bring it to its speed from rest

If an object is moving, then it is able of doing work. It has energy of motion, or also known as kinetic energy (KE). The kinetic energy of a thing hinge on the heaviness of the object along with its speed.