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Total Angular Momentum of a dumbbell

  • Thread starter chiurox
  • Start date
35
0
1. Homework Statement
A dumbbell consists of two small balls attached to the ends of a 1.0m rod of negligible mass. Ball1 has a mass of 1.0kg and ball2 has a mass of 3.0kg. The dumbbell rotates about a fixed vertical axis midway between the balls, with an angular speed of 1/pi rev/s. What is the total angular momentum of the dumbbell?


2. Homework Equations


3. The Attempt at a Solution

I=mr^2
L=wI
w=2 (since the angular speed is 1/pi rev/s?)
r^2=0.25m
m=4kg
L=2 kg*m²/s
would that be right?
 

Answers and Replies

35
0
Seems OK to me.
 
335
0
Perfect.
 

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