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Nostrana [21]
3 years ago
14

A star is rotating at 5.55x10-5 π rad/s, its velocity decelerates at a constant rate of 0.5x10-9 π rad/s2.?

Physics
1 answer:
Basile [38]3 years ago
4 0
<h2>The current rotational period of that star is 10.01 hours.</h2>

Explanation:

Given that,

Initial angular velocity of the star, \omega=5.55\times 10^{-5}\pi \ rad/s

It decelerates, final angular speed, \omega_f=0

Deceleration, \alpha =-0.5\times 10^{-9}\pi \ rad/s^2

It is not required to use the rotational kinematics formula. The angular velocity in terms of time period is given by :

\omega=\dfrac{2\pi}{T}

T is current rotational period of that star

T=\dfrac{2\pi}{\omega}

T=\dfrac{2\pi}{5.55\times 10^{-5}\pi \ rad/s}

T = 36036.03 second

or

1 hour = 3600 seconds

So, T = 10.01 hours

So, the current rotational period of that star is 10.01 hours. Hence, this is the required solution. Hence, this is the required solution.

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