Recent content by iancheung228

yup i figured after having a conservation with another person on physics forum. is it true that there's increasing error as my magnet move towards the center of the wheel?

Haha, I am not sure what you meant by that but let me try to explain to you what i understand So I parallel = Icm +Md^2 so mass is the mass of magnet and d is the distance from the center of magnet to the center of wheel but how do you calculate the Icm, just i=mr^2?, but in that case we are...

i think i understand the parallel axis theorem now. Thank you i have another question thought, how do i find the initial moment of inertia of the magnets?

but i thought the magnets and the wheel share the rotation axis

I think i will read the parallet axis theorem again. tahksn

sorry can you explain this theorem to me as I have not yet learn the moment of inertia at school and i don't really understand this part

yes the plastic disc is solid.

y um um maybe the photo isn't too clear, but the wheel is actually a clear plastic, i used black tape so the photogate can sense it. in other words, the wheel is not a hollow cylinder.

Homework Statement I am currently doing a lab investigating the relationship between the moment of inertia and speed. I have attached some pictures of my 'wheel' that is going to be rolled down a ramp. FYI i will be using a photogate to measure the time it takes the black strip to pass through...

But for some reason, I can't get like a reasonable value with these formulas. MgH=v^2(m/2+Isystem/2r^2) where M is the mass of the whole wheel system 0.369kg. g is 9.8 H is the initial height on the ramp which is 0.105m V is measured with a photogate ,0.10m/0.11746s= 0.85135m/s radius of the...

Hello, thank you for your suggestion, i actually went on the internet and tried to derive the moment of inertia of the solid wheels, which is 1/2 m r^2 . for the moment of inertia for the 8 magnets, I could either assume they are point mass, and use this formula I=mr^2. however, as i move the...

hello all, I am currently doing a lab investigating the relationship between the moment of inertia and speed. I have attached some pictures of my 'wheel' that is going to be rolled down a ramp. FYI i will be using a photogate to measure the time it takes the black strip to pass through...