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				   230 JOULE WERE SPENT IN LIFTING A 10 KG WEIGHT TO A HEIGHT 2 m .CALCULATE THE ACCELERATION WITH WHICH IT WAS RAISED .TAKE g=10m/s2
				   

4 years ago

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Answers : (1)

										

by conservation of energy,


the energy spent in doing the work=change in ke + change in pe


therefore, 230=10 x 2 x 2  + 0.5 x 10 x v2


230=40+5v2


v2=190/5


=38m/s


now,v2=2as


a=38/4


=9.5 m /s2

4 years ago

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