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phy131studiof17:lectures:chapter11 [2017/10/23 09:10] mdawber [Rolling with spin] |
phy131studiof17:lectures:chapter11 [2017/11/02 10:10] (current) mdawber [Changing the moment of inertia of a spinning object] |
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But if it rotates around a point $0.375+0.15\,\mathrm{m}$ from it's center of mass then its moment of inertia is | But if it rotates around a point $0.375+0.15\,\mathrm{m}$ from it's center of mass then its moment of inertia is | ||

- | $I=\frac{1}{2}\times3.5\times(0.75/2)^2+3.5\times(0.375+0.15)^2$\\ | + | $I=\frac{1}{12}\times3.5\times(0.75)^2+3.5\times(0.375+0.15)^2$\\ |

$=0.16+0.96=1.12\,\mathrm{kgm^2s^{-1}}$ | $=0.16+0.96=1.12\,\mathrm{kgm^2s^{-1}}$ | ||