Question

calculate moment of inertia?

Answer 1

@.Sam. the last problem

Answer 2

Ah, yeah now the mass comes in, From the list of moments
http://en.wikipedia.org/wiki/List_of_moments_of_inertia
The ball's moment of inertia
\[I=\frac{2mr^2}{5}\]
Substitute in and you'll get 'I'

Answer 3

i think r is .12

Answer 4

Yes, in meters

Answer 5

wait my book has different formula it is \[\sum_{i=1}^{N}m_{i}(r_i)^2\]

Answer 6

Its the same just different methods, that is using sum of point masses of moment of inertias. http://hyperphysics.phy-astr.gsu.edu/hbase/isph.html#sph

Answer 7

ohk so if i use my method i know mass and radius what is i

Answer 8

never mind got it thank you....please follow

Answer 9

i got .3456 what r the units

Answer 10

Mass is kg, and radius squared is m^2, what's the unit then?

Answer 11

i know it is kg m^2 but isn't it weird

Answer 12

nm science is always weird lol