User:Rosencrantz1/sandbox

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$m_{1}-m_{2}={m_{1}+m_{2}+m_{p} \over g}a+m_{f}$
$(m_{1}-m_{2}-m_{f})g=(m_{1}+m_{2}+m_{p})a$

$0.01271={0.11804+m_{p} \over 9.81}$

$m_{f}$

$0.06781-0.05023=0.01271\times 1.346+m_{f}$

$E_{p}=mgh$
$E_{k}={1 \over 2}mv^{2}$
$E_{t}=E_{p}+E_{k}$