Question Number 29172 by byaw last updated on 04/Feb/18
Answered by mrW2 last updated on 04/Feb/18
$${mv}_{\mathrm{0}} =\left({m}+{M}\right){v}_{\mathrm{1}} \\ $$$$\Rightarrow{v}_{\mathrm{0}} =\frac{\left({m}+{M}\right){v}_{\mathrm{1}} }{{m}}=\frac{\mathrm{0}.\mathrm{084}+\mathrm{20}}{\mathrm{0}.\mathrm{084}}×\mathrm{0}.\mathrm{24}=\mathrm{57}.\mathrm{38}\:{m}/{s} \\ $$