Mechanics -- Problem Set #2

Marker's Comments ­ Set #2
(by Peter Plachta)

This set was done very well. Almost everyone attempted all the questions and all the solutions were well done. About the only comment I can make is to suggest that you take the time to learn "dimensional analysis" (see question 6) ­ it is very useful. Another comment is regarding question 4 (which everyone, including us at POPTOR, made mistakes on) ­ you have to keep in mind that rolling motion is very different from sliding. You really have to solve 2 sets of equations: forces and torques, to see what's going on.

If you have any comments / objections / arguments, preferably physics related, I welcome them. You can reach me at pplachta@physics.utoronto.ca