Angular deceleration of a circular saw blade

Thread starter Tikki
Start date Dec 16, 2022
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Angular Circular Deceleration

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The discussion revolves around calculating the angular deceleration of a circular saw blade. A participant initially used a formula that resulted in an incorrect value of 0.399 instead of the expected 7.88 rad/s². Clarification was sought regarding the value of angular velocity (w) used in the calculation. It was confirmed that the angular velocity was given in revolutions per second, which may have contributed to the confusion. Accurate conversion of units is essential for correct calculations in angular motion.

Dec 16, 2022

Tikki

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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Dec 16, 2022

kuruman

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What number did you use for w?

Dec 16, 2022

Tikki

kuruman said:

What number did you use for w?

6.57rads/s

Dec 16, 2022

Tikki

Tikki said:

6.57rads/s

wait a min?

Dec 16, 2022

kuruman

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Tikki said:

wait a min?

Yup, it is given in revolutions per second.

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