The speed of the particle in rpm is 43170.32 rpm.
Given:
The distance of particle (radius) from the axis is [tex]r=6\rm \: cm=0.06\; m[/tex].
The acceleration (centripetal) experienced by the particle is,
[tex]a=125000\rm \; g's\\a=125000\times 9.81 \rm \; m/s^2\\a=1226250\rm \; m/s^2[/tex]
Let ω be the angular velocity of the particle and N be the speed in rpm.
So, ω will be [tex]\omega=\dfrac{2\pi N}{60}[/tex]
Now, the acceleration of the particle can be written as,
[tex]a=\omega^2r\\a=\left(\dfrac{2\pi N}{60}\right)^2\times 0.06[/tex]
So, the speed of the particle in rpm will be,
[tex]a=\left(\dfrac{2\pi N}{60}\right)^2\times 0.06\\12262550=0.01095N^2\times 0.06\\N=43170.32\rm \; rpm[/tex]
Therefore, the speed of the particle in rpm is 43170.32 rpm.
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