Section 8.1-8.4
As in all parts of the course, your primary source of information is the book.
Make sure to read carefully and do the worked out example without looking at
the solution first. Examples 8.3 and 8.4 and surrounding text are crucial and
they will not be discussed anywhere else. STOP at the end of section 8.4. We
will not do section 8.5 until later.
Dynamics of Circular Motion
There is nothing new in chapter 8 in terms of theory. Dynamics of circular
motion can be tricky and confusing but you must always remember.
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There are no new forces.
Do not invent forces, always use the same method to identify
forces
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The acceleration is known in uniform circular motion. It is toward the
center and the magnitude is
<span>a_r = \frac{v^2}{r} </span>
Do not get confused by the circular motion when identifying forces. You do as
before, first find what is the object touching, you get contact forces for
those, then add gravity and thats it.
Here is an example of circular motion. This is just a "coin", really a
weighted mass, on a turntable.