Question

A disc of radilsu 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 a radius.

Answer 1

Correct Answer - 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`