Science, asked by chiragverma, 1 year ago

please solve 90w wala question

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Answered by Anonymous

2

V=w/t

w=vxt=90x50=3600
w=f x s
w= 20f
F = 3600/ 20
=180
i.e. 180 N on each stair
no. of stairs 3600/180
=20

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