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problem physics angular momentum?
a slender uniform rod is rotating around one end. length = 1m, mass = 50.0 g
A bug sits at the other end of this rod, and has mass 10.0 g.
It jumps off the bar with velocity 20 cm/s.
What is the angular velocity of the bar after it jumps?
Now, I think I am tackling the problme the wrong way, using the wrong formluae... what would you do?
thanks
that's the pointm, there is no initial velocity given
1 Answer
- PearlsawmeLv 79 years agoFavorite Answer
You have stated that the rod is rotating, then what was its initial velocity ?
Use conservation of angular momentum
I for the rod = ML^2/ 3 and for the bug m L^2 = 0.027 *
Angular momentum remove by jumping bug is mL^2* 0.2*/ L = 0.002
0.027 v1 = 0.027 v2 * 0.002
Substitute the value of v1 and solve for v2
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