Question

1.
A circular disc is rotating about its own axis at
uniform rate completes 30 rotations in one
minute. The angular velocity of disc in rad/s is​

Answer 1

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angular displacement=30×2π radian=60 radian

now the angular velocity is

$w = \frac{60\pi}{60} \: rad.s {}^{ - 1} = π \: \: rad.s {}^{ - 1}$

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Answer 2

Explanation:

30 rotations in one minute means that

30*(2π) is covered in 60 seconds .

w = π rad/s