Question

it takes 20 sec for a girl A to climb up the stairs while girl B takes 15 sec for the same job. compare : (1) the work done and (2) the power spent by them .
(i) 1:1
(ii) 3:4​

Answer 1

Explanation:

Work done is 1:1

Power spent 4:3

Answer 2

Answer:

(1). For work done: work does not depend on time so work will be same for both.

W 1 /W2 =1:1

2) Power spent will. be dependent

P=W/T

P1/P2 proportional T1/ T2

P1:P2=3:4

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