Final answer:
The equation for power is B. Work/time, expressed as P = W/t. The SI unit for power is the watt (W), and the equation for work used in the definition of power is W = Fd. Only option B accurately describes the equation for power.
Step-by-step explanation:
The equation for power is B. Work/time. In physics, power is defined as the rate at which work is done. The equation for average power P for work W done over a time t is expressed as P = W/t, where work is the force applied to an object times the distance that the object travels while the force is being applied. The SI unit for power is the watt (W), which is equivalent to 1 joule per second (1 J/s).
The formula for work, W = Fd, where F is force and d is distance, can be used with the definition of power to calculate the power involved in moving an object over time. Therefore, while options A and B are related to calculations of power, only option B precisely defines the equation for average power in physics. Option A is incorrect because it does not consider the force exerted through a specific time period, and option C focuses on a specific example involving repetitive motions, such as weightlifting, and does not capture the general definition of power.