A cannon of mass $m_{1} = 10000 k g s$ located on a smooth horizontal platform fires a shell of mass $m_{2} = 200 k g$ in horizontal direction with a velocity $v_{2} = 300 m / s$ . Find the velocity of the cannon after it is shot.

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Solution

$m_{1} v = m_{2} v_{2} + m_{1} v_{1}$

$1000 \times 0 = 200 \times 300 + 1000 \times v_{1}$

$1000 v_{1} = - 6000$

$v_{1} = - 6 m / s$

negative sign indicates opposite dire

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A cannon of mass m1=10000 kgs located on a smooth horizontal platform fires a shell of mass m2=200 kg in horizontal direction with a velocity v2=300 m/s. Find the velocity of the cannon after it is shot.

m1v=m2v2+m1v11000×0=200×300+1000×v11000v1=−6000v1=−6m/snegative sign indicates opposite dire

A cannon of mass $m_{1} = 10000 k g s$ located on a smooth horizontal platform fires a shell of mass $m_{2} = 200 k g$ in horizontal direction with a velocity $v_{2} = 300 m / s$ . Find the velocity of the cannon after it is shot.

$m_{1} v = m_{2} v_{2} + m_{1} v_{1}$

$1000 \times 0 = 200 \times 300 + 1000 \times v_{1}$

$1000 v_{1} = - 6000$

$v_{1} = - 6 m / s$

negative sign indicates opposite dire