What is the formula for horsepower?

The formula for horsepower is derived from the relationship between torque and rotational speed. Horsepower is a unit of power that quantifies the rate at which work is done or energy is transferred. The correct formula states that horsepower equals torque multiplied by rotational speed measured in revolutions per minute (RPM).

Torque is a measure of the rotational force applied, while RPM indicates how fast the engine or mechanical system is turning. When these two variables are multiplied together, you obtain the power output in horsepower, which effectively demonstrates how much work the engine can perform over time at a given speed.

This understanding is essential in fields like automotive engineering and mechanics, where evaluating the performance of engines and motors is crucial. Other options do not accurately represent the specific relationship defined for horsepower. For instance, work and time combinations or force and distance are related to work done but do not cover the rotational aspect that horsepower specifically addresses.