How is power calculated?

Power is defined as the rate at which work is done or energy is transferred. In physics, power can be expressed mathematically as the amount of energy used per unit of time. Therefore, the formula for power is energy divided by the time taken to do the work or energy transfer.

When energy is transferred or work is done over a certain period, dividing the total energy by the time taken gives the power output. This means that if you have a fixed amount of energy that is used over a specific time frame, you can calculate how much power is being used during that time.

While other choices may relate to forces and motion, they do not accurately capture the definition of power in the context of energy transfer. The relation of force with speed in one of the options suggests a relationship to kinematics but does not represent the fundamental definition of power as the rate of energy usage.