Science, asked by SharadVSoraiya, 1 year ago

a boy of mass 15 kg climb up 20 step in 20 second if each step is 25 cm high then calculate the power used in climbing (take g=10m/s)

Answers

Answered by Zainab06

Given:
Length of steps=25/100*20=5m
h=5m (steps)
P=W/t
W=mgh
=15*10*5
=750J
P=750/20

=37.5

Zainab06: 25/100=1/4 so 1/4 * 20 = ?

SharadVSoraiya: sorry not able to understand right now also

Zainab06: ok

SharadVSoraiya: plzz tell

Zainab06: you are finding the length of 20 steps to find the height

SharadVSoraiya: yes

Zainab06: first you have to find length of one step which is 25/100 because the given value is in cm. You have to convert it into m

Zainab06: then multiply by 20 because there aare 20 steps

SharadVSoraiya: thanxxx i have understood now

Zainab06: Great

Answered by EmadAhamed

Force = m x g = 15 x 10 = 150 N

Displacement = 25cm x 20 steps = 500cm = 5m

Work = 150 x 5 = 750 J

Power = 750 / 20 = 37.5

EmadAhamed: Brainliest?

SharadVSoraiya: yes

SharadVSoraiya: but 25/100*20 How???

Zainab06: The answer is 37.5 not 375

SharadVSoraiya: yes but i am not able to understand ur step

EmadAhamed: 25/100 to convert cm to m

EmadAhamed: and 20 for total 20 steps

SharadVSoraiya: yes I understood

SharadVSoraiya: thanx

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