At 10:47: Shouldn't it be m*r* (theta dot)^2 instead of m*r^2*(theta dot)? Otherwise substituting (theta dot) will just cancel out everything and leave 'l' . Lol
Yes, the textbook for this course has the (thetadot)^2, not r^2: online.kottakkalfarookcollege.edu.in:8001/jspui/bitstream/123456789/357/1/introduction-to-lagrangian-hamiltonian-mechanics%20%281%29.pdf (Eqn. 4.11)
Revolutionary lecture
At 10:47: Shouldn't it be m*r* (theta dot)^2 instead of m*r^2*(theta dot)? Otherwise substituting (theta dot) will just cancel out everything and leave 'l' . Lol
r * (theta dot) is the angular velocity. Multiplying it by r once again, you get the "real" tangential velocity.
exactly this theta dot square that also confused me for a while
Yes
Yes, the textbook for this course has the (thetadot)^2, not r^2: online.kottakkalfarookcollege.edu.in:8001/jspui/bitstream/123456789/357/1/introduction-to-lagrangian-hamiltonian-mechanics%20%281%29.pdf (Eqn. 4.11)