1. The problem statement, all variables and given/known data Q1. A ball is rolling on a flat surface and another ball rolling on an inclined surface. When do both the balls have same velocity? Q2. When two people throw a ball and catch for a period of time, will the distance between them increase, decrease, or remain the same? 2. Relevant equations Q1. No equations or numbers given - just t1, t2, etc. Q2. This is also a conceptual question and no equations or numbers given. 3. The attempt at a solution Q1. I looked at the space between each ball as it is rolling, wherever the gap was same, I chose that time period as having same velocity. Q2. The distance would remain the same if the velocity is constant throughout. Please let me know if my thinking is in the right direction for both these questions. Thanks.