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A 021-M Radius Grinding Wheel Takes 2

Question 59

Multiple Choice

A 0.21-m radius grinding wheel takes 2.2 s to speed up from 4.0 rad/s to 13.0 rad/s.What is the wheel's average angular acceleration?


A) 8.2 rad/s2
B) 4.1 rad/s2
C) 1.4 rad/s2
D) 0.9 rad/s2
E) ​19.5 rad/s2

Correct Answer:

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