Angular deceleration of a circular saw blade

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SUMMARY

The discussion centers on the calculation of angular deceleration for a circular saw blade, specifically addressing discrepancies in results. The correct angular velocity (w) used in the calculations is 6.57 radians per second, which is derived from the provided revolutions per second. The expected angular deceleration is 7.88 rad/s², indicating a need for precise input values in angular motion formulas.

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  • Understanding of angular motion concepts
  • Familiarity with angular velocity and acceleration
  • Knowledge of the relationship between revolutions per second and radians per second
  • Proficiency in using formulas for angular deceleration
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Tikki
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Homework Statement
If a circular saw blade is spinning at a rate of 6.57 revolutions per second, what is the magnitude of the (constant) angular acceleration that needs to be applied on the saw blade to bring it to rest in 17.2 revolutions?
Relevant Equations
theta = no of revs * 2pi
w^2=2a(theta)
I tried the formula I showed up there but got 0.399 instead of 7.88rad/s^2.
 
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What number did you use for w?
 
kuruman said:
What number did you use for w?
6.57rads/s
 
Tikki said:
6.57rads/s
wait a min?
 
Tikki said:
wait a min?
Yup, it is given in revolutions per second.
 
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