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The block has to be raised to a height L...

The block has to be raised to a height L in the same time t. In which case force required is more ?

Text Solution

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(i) `2F_(1)-mg=ma`
`F_(1)=(m)/(2)(g+a)`
(ii) `F_(2)-mg=ma(therefore a_(1)=a_(2))`
`F_(2)=mg+ma therefore F_(2)gt F_(1)`
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