A uniform metre scale is kept in equilibrium when supported at the 60 cm mark and a mass M is suspended from the 90cm mark in the figure. State with reasons, whether the weight of the scale is greater than, less than or equal to the weight of mass M.

Given that

In equilibrium,

weight of scale at 50 cm mark × (60 – 50) cm

= weight of mass M × (90 – 60) cm

Hence, weight of scale = 3 × weight of mass M.

Therefore, weight of scale is greater than the weight of mass M

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