PHYS 2101 Lecture : Lecture11
Document Summary
Friday feb. 10, 2012: si sessions: (i emailed this info to you ) Of ce hours: wednesday and thursday from 3:00-4:00 in allen 039. Hw4 is due monday at 11:59pm: exam 2 : feb 28@ 6pm in lockett 16 (our section) Today : finish chapter 8, start chapter 9. Plot of u(x), the potential energy as a function of the a system with 1-d movement along x-axis: Equilibrium positions: where slope of u(x) curve is zero [i. e. f(x) = 0 ; no force ] Ke=0 ; f=0 & if move left or right move back. Ke=0 ; f=0 but if move left or right force to move away. Until now, we"ve taken boxes, balls, pigs, penguins to be particles. We know how apply newton"s laws to determine dynamics of a point particle: actual objects exhibit more complicated motion! E. g. spiral or tumbling motion of a football: every object has one point that exhibits ideal projectile motion.
