Question

An old clock has a spring that must be wound to make the clock hands move. Which statement describes the energy of the spring and hands of the clock?

Answer 1

The kinetic energy of the hands of the clock is converted from the potential energy of the spring, that is wound initially.

   Elastic tortional energy in the sping (Potential energy) + kinetic energy spent the hands of the clock = Initial energy given by winding = constant

   1/2 * T * θ²  + (power required to move the hands) * (time elapsed after winding the key) = 1/2 T * θ₀²

Answer 2

The spring has potential energy and the hands have kinetic energy.