Question

It takes 10 S for Geeta of mass 40 Kgf to climb up the stairs ,while Anitha of same mass does the same in 20 S.The ratio of power is *​

Answer 1

Answer:

Explanation:

(i) We know that work done is a product of force and displacement and is independent of time. Hence both persons A and B will do the same amount of work.

Therefore, ratio of work done by A and B = 1:1

(ii) The power developed by the persons A and B :

We know that Power = work done / time

Work done is same by A and B

Time A took = 10 s

Time B took = 20 s

Therefore, more power is spent by B as B does the work at a faster rate.

Substituting the values in formula we get :

Power = 1 / time

Power spent by A:Power spent by B= 20/10

⇒Power spent by A:Power spent by B=2:1