a disk, initially rotating at 120 rad/s, is slowed down with a constant angular acceleration of magnitude 4.0 rad/s2 . (a) how much time does the disk take to stop? (b) through what angle does the disk rotate during that time?

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28-10-2022
Physics

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a disk, initially rotating at 120 rad/s, is slowed down with a constant angular acceleration of magnitude 4.0 rad/s2 . (a) how much time does the disk take to stop? (b) through what angle does the disk rotate during that time?

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abhinavjh321 abhinavjh321 · Answer 1 · 2022-11-02T08:33:42-04:00

A disk that is revolving at 120 rad/s is slowed down by an angular acceleration that is constant and magnitude 4.0 rad/s2. The disk uses 30 seconds of time. The disk rotates at an angle of 1900 rad throughout time.

On an inverse logarithmic astronomical magnitude scale, absolute magnitude is a measurement of a celestial object's luminosity. The definition of an object's absolute magnitude is the apparent magnitude that the object would have at a distance of exactly 10 parsecs, without extinction (or dimming) of its light from absorption by interstellar matter and cosmic dust. Their luminosities can be directly compared among each other on a magnitude scale by imagining setting each item at a uniform reference distance from the viewer.

Like all astronomical magnitudes, it is possible to specify the absolute magnitude for several wavelength ranges corresponding to distinct filter bands.

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