A billiard ball (ball: 1) moving at 5 m/s hits a stationary ball (ball: 2) of the similar mass. After the collision, ball: 1 move at a speed of around 4.35 m/s. Determine the speed of ball: 2 after the collision.
i) 1.25 m/s
ii) 1.44 m/s
iii) 2.16 m/s
iv) 2.47 m/s
v) 2.68 m/s
What equation do you make use of to solve the problem?