A body of mass m moves at constant angular speed ω in a horizontal circle of radius r. What is the work done on the body in one revolution?
Correct answer: A. Zero
- A. Zero
- B. 2 π mr2 ω2
- C. π mr3 ω2
- D. mr2 ω2
Explanation
In this question, the key concept is understanding that in circular motion with constant angular speed, the work done is zero. This is because the force acting on the body is perpendicular to the displacement, resulting in no work being done. Therefore, the correct answer is option A, which states that the work done is zero. The other options provide incorrect formulas that do not apply to this specific scenario of circular motion.
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