PHYS 101 Lecture Notes - Lecture 25: Cross Product
21 Jul 2015
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Phys 101: physics for the life sciences lecture 25: Ipulley is known: calculate the linear speeds of the masses when they"ve moved a distance h as shown. Take as the system everything (the pulley, masses, earth and it"s gravity) Eext=0= ke+ pe+ ethermal m1 v 1f 2 0 m2 v 2f 2 0. [m1+m2: find the angular speed of the pulley. Just divide the answer to part a by the radius. A b=c (where a, b, and c are vectors) A b = c = a b sin (where is the smallest angle between a and b) Take your hand and point your fingers in the direction of a. Curl your fingers in the direction of towards the second vector b. Stick out your thumb so that it points in the direction of a b (i. e. in the c direction). Consider a particle moving along some path: V and p point in the same direction.
