5 kg 15 kg 20 kg on right of the pivot 10 15 kg on left of the pivot s
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5 kg , 15 kg & 20 kg on right of the pivot, 10 & 15 kg on left of the pivot \Sigma \tau_{0}= \sum \mathrm{Tog}= \Sigma \tau=\Sigma T_{c}+\Sigma \tau_{\infty}=