Aspy is running across the bridge of an aircraft carrier. the spy is moving with a velocity of - 4 m/s relative to the carrier. however, the aircraft carrier is moving with a velocity of 12 m/s. there is a person standing stationary on a beach watching the event. what will be the velocity of the spy according to the person on the beach? 8 m/s 6 m/s -4 m/s -7 m/s

Wind or electric energy force force of friction

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.