Hello again everyone! I've been plowing through yet another worksheet and thought I'd been okay until my solutions and formulas stopped working :( I was wondering if someone could tell me what I'm doing wrong. Thanks for reading! 1. The problem statement, all variables and given/known data - A 225g ball moves right with a velocity of 30cm/s. (.225kg and .3m/s) - This ball collides with a 125g ball also moving to the right with a velocity of 10cm/s. (9.125kg and .1m/s) - After they collide the velocity of the 125g ball is 24cm/s(.24m/s) to the right. What is the velocity of the 225g ball after the collision? 2. Relevant equations & 3. The attempt at a solution I showed all of my work (information and relevant equations) in the attached document. What I don't understand is why it's all wrong and why the direction I got is negative (it's positive in the answer key). Any help would be really appreciated. I have a whole page of these to do but this one is stopping me as I am obviously doing something wrong.