What occurs to a body's speed when the net work is positive?

When the net work done on a body is positive, it means that energy is being added to the system. According to the work-energy principle, the net work on an object is equal to the change in its kinetic energy. A positive net work indicates that the kinetic energy of the object is increasing.

As kinetic energy increases, the speed of the body must also increase because kinetic energy is directly related to speed through the equation ( KE = \frac{1}{2} mv^2 ), where ( m ) is the mass and ( v ) is the speed of the object. Therefore, with positive net work, the speed of the body will increase, confirming the correct answer as a body will speed up.

In contrast, if the net work were zero, the speed would remain unchanged, and if it were negative, the body would lose kinetic energy and slow down.