- #1
Felix83
- 75
- 0
On a frictionless table, a glob of clay of mass 0.38 kg strikes a bar of mass 1.76 kg perpendicularly at a point 0.12 m from the center of the bar and sticks to it.
If the bar is 0.66 m long and the clay is moving at 5.7 m/s before striking the bar, what is the final speed of the center of mass?
I found this part to be 1.012 m/s, which is correct, simply using conservation of linear momentum.
I can't figure out the next part:
At what angular speed does the bar/clay system rotate about its center of mass after the impact?
I tried using conservation of angular momentum, which seems to me like it should work, but the computer says it's wrong. I tried it assuming the center of mass doesn't change when the clay hits it, and then did it again figuring in the change in center of mass.
If the bar is 0.66 m long and the clay is moving at 5.7 m/s before striking the bar, what is the final speed of the center of mass?
I found this part to be 1.012 m/s, which is correct, simply using conservation of linear momentum.
I can't figure out the next part:
At what angular speed does the bar/clay system rotate about its center of mass after the impact?
I tried using conservation of angular momentum, which seems to me like it should work, but the computer says it's wrong. I tried it assuming the center of mass doesn't change when the clay hits it, and then did it again figuring in the change in center of mass.