In the given figure, the block of mass m is dropped from the point 'A'. The expression for kinetic energy of block when it reaches point 'B' is

Question

${1 \over 2}mg\,{y_0}^2$

${1 \over 2}mg\,{y^2}$

$mg(y - {y_0})$

$mg{y_0}$

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