calculate where the 15 kg must be placed for the beam to balance and try it. Note that you can only place the items in multiples or 0.25m. \Sigma \tau_{0}= \Sigma \tau_{\infty}== \Sigma \mathrm{T}=\Sigma \mathrm{T}_{0}+2 \mathrm{~T}_{\mathrm{oc}}=
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