Week of 9/30

This week I had three students come in with questions about free-body diagrams, and work.  One student came in with a question concerning work done by static friction and I misspoke, saying that static friction does not do work.  While this is often true because static friction is static. In this case of a conveyor belt the static friction was doing work. As a result, she used her last attempt on her homework. I have been in touch with Dr. Nero about correcting this situation.