Question

Two women Shanti and Kamla each of mass 50kg and 60kg respectively climb up through a height of 10m. Shanti takes 20s while Kamla takes 40s to reach. calculate the difference in the power expended by Kamla and Shanti???

Answer 1

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Answer 2

MASS OF SHANTI=50 KG (M1)
MASS OF KAMLA=60 KG(M2)
TIME TAKEN BY SHANTI=20SECONDS(T1)
TIME TAKEN BY KAMLA=40 SECS(T2)
HEIGHT REACHED BY THEM=10M

WORK DONE BY SHANTI= M1GH
                                           =50*9.8*10
                                           =4900J.
POWER= WORK DONE/TIME TAKEN
              =4900/20   
              =245W.

WORK DONE BY KAMLA= M2GH
                                          =60*9.8*10
                                          =5880J.
POWER= WORK DONE/TIME TAKEN
              =5880/40
              =147W.
DIFFERENCE IN POWER=( 245-147)W
                                           =98W.