One horsepower (HP) = ?

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Multiple Choice

One horsepower (HP) = ?

Explanation:
Power is commonly expressed in watts, and one mechanical horsepower is defined as the amount of power needed to lift 550 pounds one foot per second. Convert that to watts using 1 foot-pound per second is about 1.3558 watts. So 550 × 1.3558 ≈ 745.7 W, which is typically rounded to 746 W. That makes 746 W the standard value for one horsepower. The other numbers are noticeably off from this defined amount—roughly one-third HP, two-thirds HP, or about 1.3 HP, respectively.

Power is commonly expressed in watts, and one mechanical horsepower is defined as the amount of power needed to lift 550 pounds one foot per second. Convert that to watts using 1 foot-pound per second is about 1.3558 watts. So 550 × 1.3558 ≈ 745.7 W, which is typically rounded to 746 W. That makes 746 W the standard value for one horsepower. The other numbers are noticeably off from this defined amount—roughly one-third HP, two-thirds HP, or about 1.3 HP, respectively.

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