Constants Periodic TableView Available Hint(s)A heavy flywheel is accelerated (rotationally) by a motor thatprovides constant torque and therefore a constant angularacceleration a. The flywheel is assumed to be at rest at timet 0 in Parts A and B of this problem.at201Previous AnswersSubmitCorrectPart CAssume that the motor has accelerated the wheel up to an angular velocity wi with angular acceleration a in time t1. At this point, the motor is turned off and abrake is applied that decelerates the wheel with a constant angular acceleration of -5a. Find t2, the time it will take the wheel to stop after the brake isapplied (that is, the time for the wheel to reach zero angular velocity)Express your answer in terms of some or all of the following: w1, a, and t1View Available Hint(s)V ΑΣφ?Et2SSubmitProvide FeedbackNext

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Asked Oct 29, 2019
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Part C

Constants Periodic Table
View Available Hint(s)
A heavy flywheel is accelerated (rotationally) by a motor that
provides constant torque and therefore a constant angular
acceleration a. The flywheel is assumed to be at rest at time
t 0 in Parts A and B of this problem.
at2
01
Previous Answers
Submit
Correct
Part C
Assume that the motor has accelerated the wheel up to an angular velocity wi with angular acceleration a in time t1. At this point, the motor is turned off and a
brake is applied that decelerates the wheel with a constant angular acceleration of -5a. Find t2, the time it will take the wheel to stop after the brake is
applied (that is, the time for the wheel to reach zero angular velocity)
Express your answer in terms of some or all of the following: w1, a, and t1
View Available Hint(s)
V ΑΣφ
?
E
t2
S
Submit
Provide Feedback
Next
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Constants Periodic Table View Available Hint(s) A heavy flywheel is accelerated (rotationally) by a motor that provides constant torque and therefore a constant angular acceleration a. The flywheel is assumed to be at rest at time t 0 in Parts A and B of this problem. at2 01 Previous Answers Submit Correct Part C Assume that the motor has accelerated the wheel up to an angular velocity wi with angular acceleration a in time t1. At this point, the motor is turned off and a brake is applied that decelerates the wheel with a constant angular acceleration of -5a. Find t2, the time it will take the wheel to stop after the brake is applied (that is, the time for the wheel to reach zero angular velocity) Express your answer in terms of some or all of the following: w1, a, and t1 View Available Hint(s) V ΑΣφ ? E t2 S Submit Provide Feedback Next

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Expert Answer

Step 1

Given:

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Velocity of the wheel when the brakes are applied = a Deacceleration provided by the brakes 5a Time taken by the wheel to stop t

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Step 2

Calculating the time taken b...

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Angular velocity of the wheel when brakes are applied= a Final angular velocity of the wheel 0 Deacceleration provided by the brakes = 5a Or Acceleration in the wheel = -5a Using first equation of motion, we can write, o, +at Substituting values, 0 = a +(-5a)t 5a

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