you place mass m on the mass holder, and released the system from rest. The syst

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.
if you increase m, the mass on the mass holder, what happens to the following quantities:
- , the angular accelertion of the pulley.
- I, the moment of inertia of the pulleys-plus-rod system.

remains the same, I decreases

decreases, I decreases

increases, I decreases

increases, I remains the same

decreases, I remains the same

decreases, I increases

remains the same, I increases

increases, I increases

remains the same, I decreases

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:
- , the angular accelertion of the pulley.
- I, the moment of inertia of the pulleys-plus-rod system.

decreases, I increases

increases, I increases

decreases, I decreases

remains the same, I increases

decreases, I remains the same

remains the same, I remains the same

increases, I decreases

increases, I remains the same

remains the same, I decreases

remains the same, I decreases

decreases, I decreases

increases, I decreases

increases, I remains the same

decreases, I remains the same

decreases, I increases

remains the same, I increases

increases, I increases

remains the same, I decreases

Explanation / Answer

a)
alpha = torque/I
as mass is ncreased torque will increase and so does alpha(angular acc.)
moment of inertia of the pulleys-plus-rod system will remain same... as m added is external...
so, ans is
a increases, I remains the same

b)
a decreases, I increases

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