Physics, asked by jainsakshi, 1 year ago

A boy of mass 50kg runs up a staircase of 45 steps in 9s if the height of each step is 15cm find the power take gravity as 10ms-1

Answers

Answered by suryakantmani

might my answer be helpful to you

Attachments:

sha30: 375J is right answer and m/s is not the unit but 10m/s^2

suryakantmani: ya division is wrong at last second stage

sha30: ok rest u r going in right direction

Answered by Ladylaurel

$\huge \star{ANSWER}$

Weight of boy, mg = 50kg × ${10m/s}{2}10m/s2$

= 500N

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Height of the staircase,h = 45 × $\frac{15}{100}$

= 6.75m

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Time taken to climb, t = 9s

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= $power = \frac{work \: done}{time \: taken}power$

= $\frac{mgh}{t}$

= $\frac{500N \times 6.75m}{9s}$

= 375W

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