Question

b)two children A and B both weighing 32kg start climbing up a rope separately reach height of it may take 15 seconds and B takes 20 seconds to reach that level calculate the amount of work done by A and B which of the two has more cash or Bank calculation?

Answer 1

A                                  B
m=32 kg                      m=32kg
common height=8 m
t=15 secs                     t=20 secs

therefore,  work done by A n B will be same = FS = maS
                                                  =  32 * 10 *8
                                                   = 2560 J
Power of A =  W/t = 2560/15 = 170.7watt
Power of B            = 2560/20 = 128 watt
hence A has more power comparable to B

Answer 2

Answer:

m=32kg

h=8m

g=10

W=mgh

=32*10*8

=320*8

=2560J

power of a=work/time

=2560/15

=170.6W

Power of B = work/time

=2560/20

=128W  

Hence A has more power than B.

Explanation: