- #1
corey2014
- 22
- 0
Homework Statement
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?
Homework Equations
KE=.5mv^2
KE=1/12*M*L^2*w^2
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...