<p>Ball A, rolling west at 3.0 m/s, has a mass of 1.0 kg. Ball B has a mass of 2.0 kg and is stationary. After colliding with ball B, ball A moves south at 2.0 m.s. Calculate the momentum and velocity of ball B after the collision.</p>
<p>px initial = px final
-3(1) = vbx(2)
vbx = -1.5 m/s</p>
<p>py initial = py final
0 = -2(1) + vby(2)
vby = 1 m/s </p>
<p>vb = root ((-1.5)^2 + 1^2) = 1.803 m/s
theta = arcsin (1/1.803) = 33.69 degrees --> 33.69 degrees N of W
p = mv = 2(1.803) = 3.606 kg x m/s</p>