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A disc rotates about its axis with a con...

A disc rotates about its axis with a constant angular acceleration of `4rad//s^2`. Find the radial and tangential acceleration of a particle at a distance of 1 cm from the axis at the end of the first second after the disc starts rotating.

Text Solution

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The correct Answer is:
A, B, C, D
`t=1sec, r=1cm=0.01m`
1alpha=4rad/s^2`
there `omega=alphast=4rad/s`
threfore radial acceleration
`a_n=omega^2r=(4)^2xx0.01`
`=0.16m/s^2=16m/s^2`
Therefore tangential acceleration
`a_T=alphar=0.04m/s^2`
`=4cm/s^2`
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