Question

How many kilowatts are in 1 horsepower?

Answer 1

Hint: A horsepower is a unit of measurement which is used to determine the rate at which a particular work is done. Knowing the purpose of the unit is very important in order to find the value of the unit. Here, we will discuss horsepower and what 1 horsepower is equivalent to.

Complete step-by-step answer:
James Watt, was the man behind the invention of the steam engine. He figured out a different way of measuring the rate of work done. In this invention, he equated horses to the engine power.
Technically by 1 horsepower, we mean the sustained power output of a typical draft horse.
In relation to watt, one horsepower is similar to 746 watts. And we know that 1 Watt is equal to 0.001KW.
So $1\ Horsepower = 746 \times 0.001$
$\Rightarrow 1HP = 0.746KW$
The unit horsepower is expressed as hp.

Additional Information: The idea of the invention of the Horse Power unit was on the basis of the capability of a big horse to pull a load. It was found that the horse can pull a weight of 150 pounds while walking at 2.5 miles per hour.

Note: A mechanical horsepower is defined as the power that is needed in order to lift 33,000 pounds by one foot in a duration of 1 minute. This is equal to 745.7 watt which is almost 746 watt.
However, a metric horsepower is approximately equal to 735.7 watt which is 736 watt. This is often expressed as PS.