Let t be the time that radial and tangential components of the linear acceleration of a point on the rim be equal in magnitude. At that time we have the angular velocity would be

$\omega = \alpha t = 2.1 t$

And so the radial acceleration is

$a_r = \omega^2 r = (2.1t)^2 r = 2.1^2 t^2 * 0.1= 0.441 t^2 m/s^2$

The tangential acceleration is always the same since angular acceleration is constant:

$a_t = \alpha * r = 2.1 * 0.1 = 0.21 m/s^2$

For these 2 quantities to be the same

$a_r = a_t$

$0.441 t^2 = 0.21$

$t^2 = 0.21/0.441 = 0.4762$

$t = \sqrt{0.4762} = 0.69 s$

6 0

3 years ago

Whats A Controlled Experiment? Whats A Controlled Experiment? Like what the definition is please!

frozen [14]

A controlled experiment is when scientests go throw thests to make an experiment

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Which of the following is NOT true about sweat? Sweat helps cool the body. Sweat glands are located all over the body. Sweat hel

erma4kov [3.2K]

The answer is c!!!!!!!!!!!!!!!

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Despite the gases, dust, and stars that compose the universe, it is still mostly made up of ____________________.

ivann1987 [24]

Answer:

space

Explanation:

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2 years ago