MIT 2.003SC Engineering Dynamics, Fall 2011 View the complete course: ocw.mit.edu/2-003SCF11 Instructor: J. Kim Vandiver License: Creative Commons BY-NC-SA More information at ocw.mit.edu/terms More courses at ocw.mit.edu
Professor Vandiver, thank you for another deep derivation of Torque and the Time Rate of Change of Angular Momentum. This is a different way of teaching dynamics in comparison to just a list of formulas. I am really understand mechanics better when it's taught this way.
I believe a mistake was made at 27:08 in the 7th lecture of the Engineering Dynamics playlist. When computing the kinetic energies at time 1 and 2 the magnitude of the velocity squared should've been used. Because the velocity had a component in the R hat direction, the magnitude of the velocity squared is (Rdot + R * thetaDot)^2.
neider nadid at 10:50 the velocity of A with respect to O was given as Rdot Rhat + R*thetadot Thetahat. Why would the component of velocity in the R hat direction be zero at t1 and t2?
