A body of mass 2 , kg is hung on a spring bal | vedclass

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(A) The problem asks for the reading on the spring balance when the lift moves up with a constant velocity of $2 \, m/s$.When the lift moves with a co

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$2$

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(A) The problem asks for the reading on the spring balance when the lift moves up with a constant velocity of $2 \, m/s$.When the lift moves with a constant velocity,its acceleration $a = 0$.The apparent weight $R$ is given by the formula $R = m(g + a)$.Substituting $a = 0$ and $m = 2 \, kg$,we get $R = 2(g + 0) = 2g \, N$.Since the spring balance is calibrated to read mass in $kg$,the reading is $R/g = 2 \, kg$.Note: The condition regarding the lift descending with acceleration $g$ is a separate scenario where the reading would be $m(g - g) = 0 \, kg$,but the question specifically asks for the reading when moving up with constant velocity.

$A$ body of mass $2 \, kg$ is hung on a spring balance mounted vertically in a lift. If the lift descends with an acceleration equal to the acceleration due to gravity $g$,and if the lift moves up with a constant velocity of $2 \, m/s$,the reading on the balance will be ......... $kg$.

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