A billiard ball moving at 2.2 m/s strikes a second billiard ball at rest and continues at 45° from its original direction, while the other moves at −45° from the same original direction. Both billiard balls have the same mass. Find the speed of the second billiard ball.

A) .78 m/s

B) 1.1 m/s

C) 1.6 m/s

D) 3.1 m/s

Just completed the test, the correct answer is C) 1.6m/s