Posted by Sandy on Wednesday, April 22, 2009 at 1:15pm.
A hollow tube (I = MR2) rolls without slipping along the surface. The ratio of its translational kinetic energy to its rotational kinetic energy is
a. 1
b. 2
c. 3
d. 1/2
e. 1/3
I say A becasue both add up to get the total kinetic energy.

PHYSICS  drwls, Wednesday, April 22, 2009 at 3:53pm
Translational KE is (1/2) M V^2
Rotational KE is (1/2)I w^2
= (1/2) M R^2*(V/R)^2 = (1/2) M V^2
Your answer is correct but your reasoning is faulty. The ratio could be anything and they would still add up to give total KE

PHYSICS  First Name, Monday, April 1, 2013 at 7:03am
The Answer is "I don't know. Ask I".
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