- #1
Noctix
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Homework Statement
[PLAIN]http://img576.imageshack.us/img576/6328/physics2.jpg
Homework Equations
KE(final)/Ke(initial)
The Attempt at a Solution
1/2mv2/1/2mv2
v(final)2/v(initial)2
v= wr
r(initial)=? and r(final)=?
I originally thought the r's would cancel, but they don't because they're different. what to i do with them?
the corect answer is simply w(final)/w(initial), which is 3.3ish, but I want to understand how they got to that.
thanks.
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