(adsbygoogle = window.adsbygoogle || []).push({}); Moment of Inertia

I need to calculate the moment of inertia of the setup below. I dont even know where to start, i have to initially calculate it without the point of masses and than with the point of masses. I have already calculated the acceleration for each of the experiments.

I am not asking to calculate and do all the work for me, i am asking to explain or to tell me the formula which i have to choose

The info i have is:

Hanging mass - .050kg

Pulley Radius - .010m

Point of mass 1 - .250kg

Point of mass 2 - .250kg

Acceleration - 0.00671

I believe the moment of inertia of the bare arm is

I = mr²((g-a)/a)

I = .050*.010² * ((9.8-0.00671)/0.00671)

I = 0.000005 * 1459.51 = 0.0730

Am i calculating this correctly?

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Rotational Inertia

Can you offer guidance or do you also need help?

Draft saved
Draft deleted

**Physics Forums | Science Articles, Homework Help, Discussion**