Physics - NLM Question with Solution | TestHub

Reading shown in two spring balances, ${\mathrm{S}}_1$ and ${\mathrm{S}}_2$ is 60 kg and 30 kg respectively. Spring ${\mathrm{S}}_1$ is in elongated state \& spring ${\mathrm{S}}_2$ is in compressed state. Lift is accelerating upward with acceleration $10\mathrm{m}/{\mathrm{s}}^2$. The mass is stationary with respect to lift. Then the mass of the block will be :-