3. A 3.50-kg mass hangs on the end of a spring and stretches the spring 12.5-cm. The
mass is then pulled down an additional 4.50-cm and let go resulting in simple
harmonic motion.
a. After it is let go, how long will it take it to reach its maximum height?
b. What is the maximum velocity of the object?

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.

Work is reduced while time is decreased

Answertechnician (a) is correct;