If a body of mass m is moving with constant speed v (also called tangential velocity) in a circular path of radius r, its tangential acceleration is:
Correct answer: C. Zero
- A. r v2
- B. v2/r
- C. Zero
- D. None of these
Explanation
When a body of mass m moves with a constant speed v in a circular path of radius r, its tangential acceleration is zero. This is because tangential acceleration is the rate of change of tangential velocity, and in this scenario, the speed is constant, so there is no change in tangential velocity. Therefore, the correct answer is 'Zero.' Option A and B are incorrect as they do not represent the correct formula for tangential acceleration in this situation. Option D is also incorrect as one of the given options is indeed the correct answer.
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