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CBSE Class 9 Answered

Energy
Asked by Abhijeetoo7 | 13 Feb, 2010, 12:16: AM
answered-by-expert Expert Answer

Dear Stident

Man gets 100kcal

Since efficiency =12%

He can uae 12% of 100kcal (= 12kcal) to reach height H .

So  potential energy   mgH=12 kcal

potential energy   PE= 60 X10XH   Joule = 600X4.2X H cal =2.52H kcal

==>  2.52H=12===> H= 4.76 meters

Regards

Teram

Topperlearning

 

 

Answered by | 13 Feb, 2010, 09:58: AM

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