A reminder that next Tuesday is a holiday (Veterans Day), and therefore no Kin 530 class that day. However UMass is running a Tuesday schedule on Wednesday November 12…… the result is that next week our classes are on Wednesday and Thursday at 9:30 in Totman 156.
Also, Assignment 5 on static joint moments is due in class on Wednesday. Please note the importance of the free body diagram in setting up your equations. And remember: apply the foot segment equations first to compute the reaction forces and the joint moment at the proximal joint (i.e. the ankle). Then use the calculated ankle forces and moment as “distal joint” terms for the lower leg, which will allow you to compute the reaction forces and the joint moment at the proximal joint (i.e. the knee). To get the correct knee forces and moment, be sure to apply Newton’s Law of Reaction to give the proper signs for the ankle terms as they apply to the lower leg. You can handle this either in the equations themselves (by reversing the signs of the terms), OR you can leave the equations alone and multiply the ankle joint forces and moment that were computed for the foot by -1.0. Don’t do both! Details, details, details ……
Finally, I have posted on the website a new paper (Vaughan, 1996) that you should read over the weekend, and despite the title it has nothing to do with Monty Python (too bad). Brian will be discussing aspects of Vaughan (1996) and Umberger (2008) in class next week.
Ciao, have a great weekend.