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+1 vote
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in Physics by (48.9k points)
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A boy weighing 4okgf climbs up a stair of 30 steps each 20 cm high in 4 minute and a girl weighing 3okgf does the same in 3 minutes. Compare: 

(i) The work done by them. 

(ii) The power developed by them.

1 Answer

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by (49.8k points)
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Best answer

Given: m1= 40 kgf, m2= 30 kgf, h1= h2, t1= 4 minutes = 4 x 60 sec, t2= 3 minutes = 3 x 60 sec

Comparing work done by them:

(ii) Comparing power developed by them :

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