Question

A star with an initial radius of r=1. 0108 m and a period of 30. 0 days collapses suddenly to a radius of r=1. 0104 m

Answer 1

The initial angular velocity of the star will be $w=2.4\times 10^{-6} \ \frac{rad}{sec}$.

What is angular velocity?

Angular velocity refers to how fast an object rotates or revolves relative to another point. It is a rate of change of angle.

Here for the 30 days period the angular velocity will be calculated as:

$W=\dfrac{2\pi}{T}=\dfrac{2\times \pi}{30\times 24\times 3600}=2.4\times 10^{-6} \ \frac{rad}{sec}$

So the initial angular velocity of the star will be $2.4\times 10^{-6} \frac{rad}{sec}$

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