Concepts Of Physics MCQ Edition [Volume 1]PhysicsRotational Mechanics

A disc of radius 10 cm rotates about its axis with an angular speed of 20 rad/s . Determine the linear speed of a point situated on the rim.

Options

A1 m/s
B200 m/s
C0.5 m/s
D2 m/s

Correct answer

D. 2 m/s

Step-by-step solution

Given the radius of the disc, r = 10 cm = 0.1 m Angular speed, = 20 rad/s The linear speed v of a point situated on the rim is given by the relation: v = r Substituting the given values: v = 0.1 20 = 2 m/s

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