Exam3_Fall07

# Exam3_Fall07 - TEST FORM A PHYS 172 Fall 2007 Thursday...

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2 K total = K trans + K tot + K vib K total = 1 2 M total v cm 2 = p total 2 2 M total (non-relativistic) ! p total = m total ! v cm (non-relativistic) I = m i r i 2 ! L rot = I " K rot = L rot 2 2 I = 1 2 I " 2 ! L A = ! r A # ! p \$ A = ! r A # ! F % = ( q + N & 1)! q !( N & 1)! S = k ln % hoop: I hoop = MR 2 disk: I disk = 1 2 MR 2 sphere: I sphere = 2 5 MR 2 3 1 4 1 2 and x x x x m M m p p v v M m M m ! " # = = \$ % + + &
3 Problem 1 (10 points): The following program models the motion of a spacecraft traveling in the Earth-Moon-Spacecraft system. from visual import * G = 6.7e-11 #Universal gravitational constant Earth=sphere(pos=(0,0,0) , radius=6.4e6, color=color.cyan) craft=sphere(pos=(-10.*Earth.radius,0,0) , radius=3e6, color=color.yellow) Moon=sphere(pos=(4e8,0,0) , radius=1.75e6, color=color.white) Earth.m = 8.8404e24 # mass of Earth Moon.m = 7e22 # mass of Moon

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