- #1
halo168
- 12
- 0
Homework Statement
A billiard ball (Ball #1) moving at 5.00 m/s strikes a stationary ball (Ball #2) of
the same mass. After the collision, Ball #1 moves at a speed of 4.35 m/s. Find
the speed of Ball #2 after the collision.
Homework Equations
Conservation of Kinetic Energy
Conservation of Momentum
The Attempt at a Solution
I used the Pi = Pf equation of conservation of momentum and got 0.65 m/s while the conservation of Kinetic Energy equation yielded the correct answer: 2.47 m/s. What's wrong? Why couldn't I use the momentum equation too?