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1
Chap 12
Equilibrium and
elasticity
Note – this is an outline of the lecture, print this
and take notes on it in lecture It is not the
and take notes on it in lecture. It is not the
complete lecture.
You should attend lecture to
get the complete notes
Images taken from Halliday/Resnick/Walker,
Fundamentals of Physics, 7
th
Edition, John Wiley
and Sons Inc., by permission.
Hints –problems
Do
a good freebody diagram for every one of these
problems! In some cases you may have to do a
free body diagram for a point on a rope.
(e.g.
P10, P14).
When you apply Newton’s 2
nd
law you will often
end up with two equations in two unknowns
end up with two equations in two unknowns
(sometimes >2).
If you look at the problem carefully you can often
take torque about a certain point (or sum forces
along a certain direction) to obtain one equation
in one unknown.
This makes the math easier.
Checkpoint 4 is an example of how to do this.
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This note was uploaded on 04/07/2008 for the course PHYS 213 taught by Professor Oshea during the Spring '08 term at Kansas State University.
 Spring '08
 oshea

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