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As athlete in the olympic ganes cover a ...

As athlete in the olympic ganes cover a distance of `100 m` in `10 s`. Hiskinetic energy can be estrimated to be in the range

A

`2 xx 10^(5)J-3 xx 10^(5)J`

B

`20000 J- 50000J`

C

`2000J- 5000J`

D

`200J- 500J`

Text Solution

Verified by Experts

The correct Answer is:
C
`v_("avg") = (100)/(10) = 10m//s`
`KE= (1)/(2) mv^(2)= (1)/(2) m(10)^(2)`
If m= 40kg If m= 100kg
`KE_(1)= 2000J " " KE_(2)= 5000J`
Range 2000J- 5000J
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