Week of 9/4

On my office hours Tuesday a group was working with a TA as we switched shifts, one girl stayed after he left and we worked a couple homework problems. She was having trouble with kinematics, specifically a problem where the speed of a ball instantaneously increased by 10cm/s every second. At first she didn't know how to differentiate between this change in speed and acceleration, but soon we resolved the problem. No one came to my office hours on Thursday.