Question

Ans. 4 x 104 W
12. It takes 20 s for a girl A to climb up the
stairs while girl B takes 15 s for the same job.
Compare : (i) the work done and (ii) the power
spent by them.
Ans. (i) 1 : 1 (ii) 3:4​

Answer 1

Answer:

As the distance(stairs)were same ,therefore the work done will be in equal ratio i.e. 1:1

as girl A tool 20 seconds to climb the stairs and girl B took 15 seconds to climb the same,hence girl B uses more power to cover the distance in less time.

Explanation:

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