This preview shows pages 1–3. Sign up to view the full content.
This preview has intentionally blurred sections. Sign up to view the full version.View Full Document
Unformatted text preview: ME 270 LEARNING OBJECTIVES OF EXAM 2 Topic Area 1: Frames and Machines 1. Free body diagrams (overall and individual members) 2. Newton’s Third Law 3. Zero-force members Note : • Make a plan before starting to solve • Negative solutions imply that the direction of the force is opposite to that chosen on the FBD. • Leave FBDs intact and carry negative signs throughout calculations • Be able to express solutions in vector form Topic Area 2: Friction 1. General friction problems 2. Tipping vs. slipping 3. Wedges 4. Belt friction Note : • For general friction problems- identify all potential types of impending motion and associated assumptions- know direction of impending sliding before drawing friction force- f f N max s = = μ for impending motion only • For tipping/slipping problems- Carefully read question to determine the direction of impending slipping and/or impending tipping- Make assumption of slipping or tipping- Solve- Check assumption- Rework if assumption is incorrect...
View Full Document
This note was uploaded on 09/08/2010 for the course ME 270 taught by Professor Murphy during the Summer '08 term at Purdue University-West Lafayette.
- Summer '08