First slide

Power

Question

What average horsepower is developed by an 80 kg man while climbing in 10 s a flight of stairs that rises 6 m vertically

Moderate

A

0.63 HP
B

1.26 HP
C

1.8 HP
D

2.1 HP

Solution

$p = \frac{mgh}{t} = \frac{80 \times 9 .8 \times 6}{10} W = \frac{470}{746} HP = 0 .63 HP$

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