PhysicsMedium68×since 2002Q7589A block of mass M placed inside a box descends vertically with acceleration 'a'. The block exerts a force equal to one-fourth of its weight on the floor of the box. The value of 'a' will beAg4{g \over 4}4gBg2{g \over 2}2gC3g4{3g \over 4}43gDgCheck answerSkip