One horsepower is equal to how many watts, and how many foot-pounds per minute?

• A. 1000 Watts, 33,000 foot-pounds per minute
• B. 746 Watts, 66,000 foot-pounds per minute
• C. 746 Watts, 33,000 foot-pounds per minute
• D. 500 Watts, 33,000 foot-pounds per minute

Answer: (C)

Power is the rate at which work is done. One horsepower is defined as the power to do 550 foot-pounds of work each second. Multiply by 60 to express this per minute: 550 × 60 = 33,000 foot-pounds per minute.

In SI units, a watt is one joule per second, and by definition 1 horsepower is exactly 746 watts. This comes from converting 550 foot-pounds per second to joules per second (1 foot-pound ≈ 1.3558 joules), giving 550 × 1.3558 ≈ 746 watts.

So the correct pairing is 746 watts and 33,000 foot-pounds per minute. The other options mix the wrong watt value or the wrong foot-pounds-per-minute value for one horsepower.