How many watts are equal to one horsepower?

How many watts are equal to one horsepower?

• A. 500 watts
• B. 600 watts
• C. 1000 watts
• D. 750 watts

Answer: (D)

Power is the rate at which work is done, and horsepower is a traditional unit used for engine power. A mechanical horsepower is defined as 550 foot-pounds per second. When you convert that to watts, you get about 745.7 joules per second, so roughly 746 watts. In practice, people often round this to 746 W or, for simplicity, to 750 W. Among the given options, 750 watts is the closest to the exact value, which is why it’s the best choice. The other numbers are noticeably farther from 746 W.

Power is the rate at which work is done, and horsepower is a traditional unit used for engine power. A mechanical horsepower is defined as 550 foot-pounds per second. When you convert that to watts, you get about 745.7 joules per second, so roughly 746 watts. In practice, people often round this to 746 W or, for simplicity, to 750 W. Among the given options, 750 watts is the closest to the exact value, which is why it’s the best choice. The other numbers are noticeably farther from 746 W.