# A 600.0 kg cannon stands on frictionless wheels and fires a 9.50 kg cannonball horizontally at 150. m/s. With what velocity does the cannon move after firing the ball ?

$v = 2.375$ m/s

#### Explanation:

${m}_{1.} {v}_{1} = {m}_{2.} {v}_{2}$

$600. {v}_{1} = 9.5 \times 150$

${v}_{1} = \frac{1425}{600}$

${v}_{1} = 2.375$ m/s