Question

two children A nad B each weighing 20 kg climb a rope upto the height of 10. child A takle 10s child B takes 20s to climb. state whether the work done by both is equal or unequal. who has more power?

Answer 1

Since,

Work done=mgh=20x9.8x10=1960J

Hence it will be same for both children because m,g and h are same.

But power=Work done/Time

For A,

P=1960/10=196W

For B,

P=1960/20=98W

Hence A has more power than B.