Power refers to the amount of work done by an object in unit time, that is, power is a physical quantity that describes the speed of work. The workload is fixed, and the shorter the time, the greater the power value. The formula for finding power is power = work/time. Power is a physical quantity representing working speed. The work done per unit time is called power, which is expressed by P. Therefore, power is equal to the scalar product of the acting force and the speed of the force point of the object.
Horsepower is a commonly used unit for measuring power in engineering technology.
Generally refers to metric horsepower rather than English horsepower. It is agreed that 1 metric horsepower is equal to 1 meter per second, and the work done by lifting an object weighing 75 kilograms. Metric horsepower, its adjustment is completely artificial, take a value very close to British horsepower. It is stipulated that 1 metric horsepower is to complete the work of 75 kgf-m in 1 second. Namely: 1 metric horsepower =75 kg/sec =735 watts.