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An adult weighing 600 N raises the centr...

An adult weighing 600 N raises the centre of gravity of his body by 0.25 m while taking each step of 1 m length in jogging. If he jogs for 6 km, the energy utilised by him in jogging is

A

`9xx10^6` J

B

`9xx10^5` J

C

`6xx10^6` J

D

`6xx10^5` J

Text Solution

Verified by Experts

The correct Answer is:
B
Here, mg = 600 N, h = 0.25 m
Length of each step = 1 m
`therefore` No of steps in 6 km is `N=(6xx10^3m)/(1 m) =6000`
`therefore` Energy utilised in jogging is
`E=Nmgh = 6000 xx 600 N xx 0.25 m = 9 xx 10^(5)J`
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