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Sean1218
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Homework Statement
David spins a sling in a horizontal circle above his head. What would happen to the period of rotation if he applied the same force and the length was a) doubled, b) halved
Homework Equations
ac = (4π2r) / T2
The Attempt at a Solution
Just not sure what to do in general, I tried a few different things like this:
r [tex]\alpha[/tex] T2
2r [tex]\alpha[/tex] T2
r [tex]\alpha[/tex] T2/2
Then compared T2 and T2/2
square rooted both of them
T and T/sqrt(2)
1/sqrt(2) is 0.7, which is the answer to b), even though I was trying to do a).
edit: think I figured it out
I can just equate T and T/sqrt(2) can't I? The first T is Ta, the second is Tb, and that equation is saying that Ta is .7x smaller than Tb, in other words, Tb is 1.4x larger, right?
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