. A body is thrown up in a lift wit...
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. A body is thrown up in a lift with a velocity u relative to the lift and the time of flight is found to be The acceleration with which the lift is moving up is : (A) U-gt B, 2u-gt (C) u+gt (D) 2u+gt

JEE/Engineering Exams
Physics
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We consider the effective accelertion of the body is g' Then the equation for the time of flight for the body is Time of flight, ( t=frac{2 u}{g !} ) ( Rightarrow frac{2 u}{g+a} quad Gamma a= ) accelerstion ( Rightarrowleft[a=frac{2 u}{t}-gright] )
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