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Unformatted text preview: Quiz 9 Name: _____________________ 1) Write down the deﬁni3on for a restoring force A force that, for any small displacement from the equilibrium posi3on, is directed back towards that posi3on. 2) Consider the atwood machine shown. Let T1 be the tension of the rope pulling on m1 and T1 be the tension of the rope pulling on m2. If m1>>m2, and the moment of iner3a of the pully is comparable to these masses, how do T1 and T2 compare? a) T1>T2 b) T1=T2 c) T1<T2 3) an ice skater is spinning around with his arms outstretched. As he pulls his arms in, his angular velocity increases. Circle all that are true about this ac3on: 1) As he pulls his arms in, angular momentum is conserved 2) As he pulls his arms in, kine3c energy is conserved 3) As he pulls his arms in, his angular accelera3on is zero. 4) As he pulls his arms in, his moment of iner3a increases 5) None of the above ...
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 Spring '09
 Physics, Force

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