A billiard ball is moving in the x direction at 30.0 cm/s and strikes another billiard ball moving in the y direction at 40.0 cm/s. As a result of the collision, the second ball moves at 50.0 cm/s, and the first ball stops. In what final direction does the second ball move?
a. in the x direction
b. at an angle of 45.0o ccw from the x direction
c. at an angle of 53.1o ccw from the x direction
d. Such a collision cannot happen.
C
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