Q. 224.7( 3 Votes )

# A man whose mass is 50 kg moves up 15 steps each of height 15 cm in 45 seconds of time. Calculate the power used in climbing those stairs. (g = 10 m/s2)

Answer :

Given

Mass of Body (m) = 50 Kg,

Time (t) = 45s,

Height of each step = 15 cm,

Acceleration due to gravity (g) = 10 m/s2.

Now

Weight = mg = 50×10 = 500N

Height of staircase =

( 1 m = 100 cm)

Power =

Power =

Power = 25 Watt

Power used in climbing stairs = 25 W

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