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Loppyfoot
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Homework Statement
A thin uniform-density rod whose mass is 3.8 kg and whose length is 3.0 m rotates around an axis perpendicular to the rod, with angular speed 34 radians/s. Its center moves with a speed of 10 m/s.
(a) What is its rotational kinetic energy?
(b) What is its total kinetic energy?
Homework Equations
Well I know that Krot= 1/2I* w2. But when I try to use this equation, I get the wrong answer. I also know that I= 1/2mr^2
The correct answers are:
(a)= 1650 J
(b)= 1840 J
Does anyone have any idea on where I'm going wrong?