Posted by **Lilly** on Saturday, June 9, 2012 at 11:31am.

A 20 kg square slab with side lengths 3.0 m rotates around an axis perpendicular to the slab. A particle of mass 0.60 kg sits on each of the corners of the square. Also, a particle of mass 0.80 kg sits at the center of each of the edges. What is the moment of inertia of the system?

Help me please :)

- Physics! -
**Elena**, Saturday, June 9, 2012 at 5:32pm
m1=20 kg, a=3 m,

I1 =m•a²/6 = 20•9/6 =30 kg•m²

m2 =0.6 kg , b =a•√2/2=3•√2/2 =2.13 m.

I2 =mb²=0.6•2.13²= 2.7 kg•m²

m3 = 0.8 kg, c=a/2 =1.5 m.

I3=mc²=0.8• 1.5² =1.8 kg•m².

I =I1+4•I2+4•I3 = 30+4•(2.7+1.8) =48 kg•m².

## Answer This Question

## Related Questions

- Math - How do you do this question? The buses park on the concrete slab. the ...
- physics - A thick metal slab carries a current I A uniform magnetic field B ...
- physics - As shown in the figure, a block of mass M1 = 0.470 kg is initially at ...
- electricity and magnets - A thick metal slab carries a current I. A uniform ...
- Physics - A flat slab of styrofoam, with a density of 32 kg/m^3, floats on a ...
- Physics - A uniform solid cylinder of mass M and radius R is at rest on a slab ...
- Physics PLs DAMON HELP - A thick metal slab carries a current I as shown. A ...
- physics - A slab of copper of thickness b = 1.566 mm is thrust into a parallel-...
- Physics - A thick metal slab carries a current I as shown. A uniform magnetic ...
- Physics - Can anyone help me here? I have no idea where to start! Light in a ...

More Related Questions