blogJuan

i have a rod that has a constant mass and 2 masses at the ends. if i keep the angular velocity constant, how can i change the length of the rod to double the rotational energy?

keep in mind the rotational energy formula is k=1/2 I w^2…. where I is the moment of inertia

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If you increase the length of the rod by v2 you will double the rotational energy presuming that you keep ? constant. (It all goes into the Moment of Inertial component (I) which is ? mr^2 — increase the radius by v 2 and you double the Inertia)

| Jun 09, 2009

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