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A man standing on the turn table extends his hands suddenly. What happens?

on March 08, 2024

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Answer: By Extending the hand, the moment of inertia of the system increases and thus angular velocity ⍵ decreases. Now the turn table will slow down as I⍵ remains constant in the absence of torque.

Physics Rotational-dynamics

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Why spin angular velocity of a star is greatly increased when it collapses under gravitational pull and becomes a neutron star?

Answer: While collapsing under gravitational pull, the size of the star decreases. Therefore, its moment of inertia decreases. As the angular momentum (L=I⍵) is conserved and I decreases, the spin angular velocity ⍵ is greatly increased.

Derivation Of The Expression For The Impedance Of A Series LCR Circuit

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Define Simple harmonic motion (S.H.M). Show that the bob of a simple pendulum may move with simple harmonic motion and find its time period.

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A man standing on the turn table extends his hands suddenly. What happens?

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