(1) 3) W
13. It takes 20 s for a person A of mass 50 kg to climb
up
the stairs, while another person B of same mass
does the same in 15 s. Compare the (i) work done,
and (ii) power developed by the persons A and B.
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work done by both A and B will be same because their displacement and force against gravity is same for them .But B will have developed more power than A because he has done same work in 5 s less than that time of A.
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