Question

Answer for - it takes 20 s for a person A to climb up the stairs, while another person B of same mass does the same in 15 s . Compare the (I) the work done , and (ii) the power developed by persons A and B.
Ans. Mass of A and B = 50 kg
=> Work done ratio = 50gh/50gh = 1/1= 1:1
For the second part,
Power of A = 50gh/20= 5gh/2
Power of B = 50gh/15 = 10gh/3
Power of both A and B = 5gh/2×3/10gh
=3/4 =3:4

Answer 1

Answer:

Nice question and answer

Answer 2

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Explanation: