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A disc of radius 10 cm is rotating abou...

A disc of radius 10 cm is rotating about its axis at an angular speed of 20 rad/s. Find the linear speed of
a. a point on the rim,
b. the middle point of the radius.

Text Solution

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The correct Answer is:
A, B
Radius of disc=10cm=0.1m
Angular velocity =20 rad/s
`:.` Linear velocity on the rim
`=omegar=20xx0.1=2m/s`
`:.` linear velocity at the middle of radius
`(omegar)/2=20xx((0.1)/2)`
`=1m/s`
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