Angular acceleration - Please check if this is correct and

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Homework Help Overview

The discussion revolves around a problem involving angular acceleration related to the motion of a car's tires as they decelerate. The context includes calculating initial and final angular velocities and determining the angular acceleration based on the number of revolutions and the change in speed.

Discussion Character

  • Exploratory, Assumption checking, Mathematical reasoning

Approaches and Questions Raised

  • Participants discuss the conversion of speed from kilometers per hour to meters per second, questioning the accuracy of the conversion factor used. There are attempts to verify calculations related to angular acceleration based on the revised speed values.

Discussion Status

Some participants have provided feedback on the calculations, indicating potential errors in unit conversion. There is an ongoing exploration of different values for angular acceleration, with no clear consensus on the correct answer yet.

Contextual Notes

Participants are working under the constraints of a homework assignment, which may limit the information available for resolving the problem fully. There is an emphasis on verifying calculations and assumptions rather than reaching a definitive solution.

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Angular acceleration - Please check if this is correct and...

Homework Statement



Question:

Each of the tires of a car makes 85.0 revolutions as the car reduces its speed uniformly from 90.0 km/h to 60.0 km/m, The tires have a diamater of .900m.

Find initial and final angular Velocities

Find the angular acceleration of tires in rad/s^2

My answers: Please tell me if that's right, because I have NO idea if its correct.

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Homework Equations





The Attempt at a Solution

 
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If I am interpreting your work correctly, you are changing the km to m by multiplying by 900 instead of by 1000.

I think that the rest is OK.
 


Oops lol

Where wherever I have 900, change to 1000 correct? Just to be sure :)

Because when I change that, I get -1.60 is that correct for this question?

Because someone told me they got -4.88 ?
 
Last edited:


I got angular acc = -1.605rad/sec^2.
 

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