Computer Intensive Physics 211

InfoMall Homework #15 -Printed only (10 points)

Spring, 1998

Due 3/5/98

IFHW15:

Using the InfoMall

1. (4 pts) Find the rotational equivalent equation(s) for the conservation of
momentum. Compare it(them) to the equations for the conservation of
linear momentum in two dimensions. What conditions must be satisfied for
angular momentum to be conserved?
Cite the references you use from the InfoMall to complete this task.

2. (3 pts) A small disk of mass m and
radius r is at rest on an axis of
rotation through its center and
through the center of a disk
just below it. The lower disk
has a mass of M and a radius of
R. It is spinning with an
angular velocity of W, when the
smaller disk is dropped onto it.
What is the final angular
velocity of the two disks? What
kind of collision is this? How
does the final energy of the
system compare to its initial
energy?

3. (3 pts)(a) List the concepts you used to solve problem 2.
(b) Find a problem on the InfoMallthat requires the same concepts for its solution.
Print it and give the citation for it.
(c) Work out the solution to the problem you found on the InfoMall