Angular/Tangential Acceleration

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In a wheel turning at constant speed about a fixed axis, the angular acceleration is indeed zero because the rate of rotation does not change. However, tangential acceleration can be present if there are changes in the radius or if the wheel is not purely rotating. The correct answer to the exam question is that only the tangential acceleration is zero, as it relates to linear speed along the circumference. The relationship between tangential and angular acceleration is defined by the formula: tangential acceleration equals angular acceleration multiplied by the radius. Understanding these concepts is crucial for solving similar physics problems accurately.
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A wheel is turning about its fixed axis at constant speed. Compare the tangential and angular accelerations of a point on a wheel.
This was a multiple choice question on my exam, which I got wrong... (annoying 8% loss)

I thought only the angular acceleration would be zero since the speed is constant, but I guess snot.

a) Both are zero
b) Neither is zero
c) Only the angular acceleration is zero
d) Only the tangential acceleration is zero

I assume that both are zero, but I'm not sure.
 
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