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a)What is the moment of inertia of the wheel?

If the applied force is removed, the wheel comes to a stop in 73s.

b)What is the frictional torque?

c)How many revolutions does the wheel make during the entire 82s interval?

- Thread starter kojack21
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- #1

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a)What is the moment of inertia of the wheel?

If the applied force is removed, the wheel comes to a stop in 73s.

b)What is the frictional torque?

c)How many revolutions does the wheel make during the entire 82s interval?

- #2

mjsd

Homework Helper

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first you may want to identify some potentially useful formulas or concepts

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- #5

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- #7

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For part A, use that equation Torque = mr^2 x acceleration.

You know the torque...for acceleration just take 16/9.1...plug those values in...and you are left with mr^2, which is the moment of inertia.

For part B, apply the kinematics equation...wf= w0 + at, find the acceleration, and plug it into Torque = mr^2 x a.

- #8

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for part b...how do i do it? i get what you are saying...but it says the wheel comes to REST after 73 seconds.. so if u do the kinematics equation wf=wo + at, wouldn't wf be zero?? how do u calc that??

sorry i know you're busy w/ hw 24 i just really wanna do this one before the 2am cutoff

- #9

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it's okay,

set wf = 0 and w0 = 16, and t = 73. solve for a, which sould be a negative #.

set wf = 0 and w0 = 16, and t = 73. solve for a, which sould be a negative #.

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- #11

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AIM me...Sherry22

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