If you do 10 J of work to push a charge into an electric field and then release the charge, as it flies past its starting position, its kinetic energy is
A)less than 10 J.
B)10 J.
C)more than 10 J.

Question

Quizplus · Accepted Answer

The work-energy principle states that the work done on an object is equal to the change in its kinetic energy. Since 10 J of work is done on the charge, it gains 10 J of kinetic energy as it returns to its starting position.

If You Do 10 J of Work to Push a Charge