Question

77. What average horsepower is developed by an 80 kg man while climbing in 10 s a flight of
stairs that rises 6 m vertically
(a) 0.63 HP
(b) 1.26 HP
(c) 1.8 HP
(d) 2.1 HP
​

Answer 1

Answer:

(a) 0.63 HP

Explanation:

energy required to work against gravity = mgh

so, power generated = mgh/t = 80×9.8×6/10

= 470.4 W

again, 1 HP = 746 W

so, power generated = 470.4/746 = 0.63 HP

Answer 2

Answer:

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