A rock is thrown straight up from the earth's surface. Which one of the following statements concerning the net force acting on the rock at the top of its path is true?
The net force is instantaneously equal to zero newtons.
The net force is greater than the weight of the rock.
The direction of the net force changes from up to down.
The net force is less than the weight of the rock, but greater than zero newtons.
The net force is equal to the weight of the rock,

Ithink it’s cancer risk

stands for electromotive force and it is measured in volts. despite its name, it is not actually the force in the sense of being a "pushing" or "pulling" (not measured in newtons).an equation that relates emf,  ℰ,  to a battery's terminal voltage, v, current, i, and internal resistance, r, is    ℰ = v + irin this case, the emf can be interpreted as a voltage—a difference in electric potential.i would not say that it would be considered an energy. if emf can be defined as the energy/work per a unit charge from a battery or other electric source, then it is not strictly energy.

The answer would be d. hope this : ))