(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A uniform thin rod of length L=2.2 m and mass 5 kg can rotate in a horizontal plane about a vertical axis through its center. The rod is at rest when a 0.2 kg ball of putty, moving in the horizontal plane of the rod, hits and sticks to one end. As viewed from above, the ball's velocity vector makes an angle of θ =70° with the rod. If the ball's speed just before impact is 20 m/s, what is the angular velocity of the rod immediately after the collision?

2. Relevant equations

KE=.5mv^2

KE=1/12*M*L^2*w^2

3. The attempt at a solution

I thought this was pretty straightforward, unless I have my formulas wrong, but we just plug the numbers in... and M = 5+.2... right? because energy is conserved...

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# Homework Help: Angular velocity with inertia

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