# Problem 8-34 Elastic collision - Part 2 - B

A superball of mass $22\; g$ rolls with a speed of $3.5\; m/s$ toward another (stationary) superball of mass $27\; g$. If the balls have a head-on elastic collision, what are the velocities magnitudes and directions) of the balls after the collision?
[Ans. $3.1\; m/s$ forward and $0.4\; m/s$ backward]

Accumulated Solution

No. In the drawing we have chosen all the velocities 'after' to be positive quantities. This equation introduces another minus sign.

Try again.