In each question: you place mass m on the mass holder, and released the system f
ID: 2123624 • Letter: I
Question
In each question: you place mass m on the mass holder, and released the system from rest. The system includes two pulleys and a long rod with two point masses on it.
a) In procedure 1: if you increase m, the mass on the mass holder, what happens to the following quantities:
- a, the angular accelertion of the pulley.
- I, the moment of inertia of the pulleys-plus-rod system.
a decreases, I increases
a increases, I decreases
a decreases, I remains the same
a decreases, I decreases
a increases, I increases
a remains the same, I remains the same
a increases, I remains the same
a remains the same, I decreases
a remains the same, I increases
b) In procedure 2: if you move the two masses attached to the rotating rod away from the center of mass of the rod, what happens to the following quantities:
- a, the angular accelertion of the pulley.
- I, the moment of inertia of the pulleys-plus-rod system.
a remains the same, I decreases
a increases, I increases
a remains the same, I increases
a decreases, I remains the same
a increases, I decreases
a remains the same, I remains the same
a increases, I remains the same
a decreases, I increases
a decreases, I decreases
Need help with these two questions. Correct answer gets 1,500 points! Please do not try to copy other answers from the web, because they are incorrect. Thanks.
Explanation / Answer
if the diagram was given then I will be able to explain it better but no need to worry about it.
1 Ans. angular acceleration will increase but the moment of inertia will remain same ,because due to change in the mass ,it is disturb the equilibrium of the pulley but there will be no change in angular momentum of rod
2Ans. a remains same but I incresaes because according to conservation of angular momentum (I1w1=I2w2) . since the two masses are moved away from the center of mass of the rod the moment of inertia will increase but angular speed will decrease.
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