a flywheel, initially at rest, has a constant angular acceleration. after 9 s the flywheel has rotated 450 rad. its angular acceleration in rad/s2 is:

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Answer 1

A flywheel, initially at rest, has a constant angular acceleration. after 9 s the flywheel has rotated 450 rad . Its angular acceleration in rad/s2 is 11.11 [tex]rad/s^{2}[/tex]

theta = u*t + 1/2 * α * [tex]t^{2}[/tex]

450 = 0 +   1/2 * α * [tex](9)^{2}[/tex]            (initially the flywheel is at rest , u =0)

α  = 450 / 81

    = 11.11 [tex]rad/s^{2}[/tex]

Its angular acceleration in rad/s2 is 11.11 [tex]rad/s^{2}[/tex]

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Related Questions

how is the period of time during which the marble is being flicked completely different from the rest of the trip?

Answers

The marble is being flicked during a very short period of time compared to the rest of the trip. The marble is accelerating during this time, so its velocity is changing. The rest of the trip, the marble is not accelerating, so its velocity is constant

What is the marble's velocity?

The marble's velocity might vary from 3 m/s to 9 m/s.The length and speed of a marble's motion are measured after that, using the formula Speed = Distance / Time to determine their speed.The marble travels at its fastest speed just before it lands because that is when its potential energy changes the most, while other factors have lost the least energy up to that point.

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