alleryA wheel starting from rest reaches 20 rad/s in 4 s. Angular acceleration alpha:
A2 rad/s²
B80 rad/s²
C1 rad/s²
D5 rad/s²
Answer & Solution
Correct answer: D. 5 rad/s²
We have alpha = (omega - omega0)/t.
That is alpha = (20 - 0)/4.
So alpha = 5 rad/s².
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