The ratio of moment of inertia of two objects 'A' and 'B' is 2:3. Which one of the following is the ratio of torques of 'A' and 'B' respectively if both are being rotated with constant angular acceleration?
Correct answer: B. 2:3
- A. 3:4
- B. 2:3
- C. 3:2
- D. 4:3
Explanation
When objects are rotated with constant angular acceleration, the ratio of torques is directly proportional to the ratio of moments of inertia. In this case, since the ratio of moments of inertia of objects 'A' and 'B' is 2:3, the ratio of torques will also be 2:3. Therefore, the correct answer is 2:3. The other options provided are incorrect because they do not consider the direct relationship between moments of inertia and torques in circular motion.
This question appeared on the UHS MDCAT 2013 paper, which you can sit online with every answer explained.
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