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Ch6 HW4 f10 (Homework)
Ashlyn Baum
Physics 303K, section B, Fall 2010
Instructor: Jim Chelikowsky
Current Score :
27 / 27
Due :
Sunday, October 17, 2010 11:30 PM CDT
1.
1/1 points
Question: MI3 6.8.X.016
Consider an isolated system, by which we mean a system free of external forces. If the sum of
the particle energies in the system increases by
152
joules, what must have been the change
U
in the system's potential energy?
U
= 152
152
J
Solution or Explanation
(
E
particles
+
U
) =
W
ext
Here,
W
ext
= 0 because the system is isolated, so neccesarily
U
= 
E
particles
.
2.
8/8 points
Question: MI3 6.9.X.077
The diagram above shows the path of a comet orbiting a star. You will be asked to rank order
various quantities in terms of their values at the locations marked on the path, with the largest
first. You can use the symbols ">" and "=". For example, if you were asked to rank order the
locations in terms of their distance from the star, largest first, you would type:
"A > B > C > D > E"
Rank order the locations on the path in terms of the magnitude of the comet's momentum at
each location, starting with the location where the magnitude of the momentum is the largest:
e>d>c>b>a
E>D>C>B>A
Rank order the locations on the path in terms of the comet's kinetic energy at each location,
starting with the location where the kinetic energy is the largest:
e>d>c>b>a
E>D>C>B>A
Consider the system of the
comet plus the star
.
Which of the following statements are
correct?
The due date for this assignment is past.
Your work can be viewed below, but no changes can be made.
Page 1 of 5
Ch6 HW4 f10
11/21/2010
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This note was uploaded on 11/21/2010 for the course PHY 56665 taught by Professor Chelikowsky during the Fall '10 term at University of Texas at Austin.
 Fall '10
 Chelikowsky

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