JAMB Physics 2007 Objective — Question 48
Question 48 of 50 from the Joint Admissions and Matriculation Board (JAMB) Physics 2007 Objective paper, with the correct answer and a full explanation.
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A gramophone record takes 5s to reach a constant angular velocity of 4.pi rads-1 from rest. Find its constant angular acceleration.
- A. 20.0.pi rads-2
- B. 1.3.pi rads-2
- C. 8.pi rads-2
- D. 0.8.pi rads-2Correct
Explanation
Angular acceleration = (w1-w0)/t = (4.pi - 0)/5 = 0.8.pi rads-2.
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