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If the angular velocity of a rotating body increases from $\omega_i = 2 \text{ rad/s}$ to $\omega_f = 8 \text{ rad/s}$ in $t = 3 \text{ s}$, what is the angular acceleration $\alpha$ in $\text{rad/s}^2$?
- A.1
- B.3
- C.4
- D.2
Show correct answer & step-by-step solution
Correct answer: D — 2
Solution
Angular acceleration is defined as . Substituting the values, .
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