Q. 65.0( 6 Votes )
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 a radius.
Answer :
Given –
Radius of disc = 10 cm = 0.1 m
Angular velocity = 20 rad/s
(a) Now, the linear velocity of the rim is given by -
(b) To calculate linear velocity at the middle of the radius, divide the above equation by 2 we get-
Linear velocity at the middle of radius –
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