In angular motion, Newton's second law of motion is:
Correct answer: B. τ = Iα
- A. F = ma
- B. τ = Iα
- C. F = P/t
- D. All of the above
Explanation
The correct answer is τ = Iα, which is the angular analog of Newton's second law. In angular motion, this law states that the torque (τ) applied to an object is equal to the moment of inertia (I) of the object times the angular acceleration (α). This is similar to the linear form, F = ma, where force (F) is the product of mass (m) and linear acceleration (a).Option A, F = ma, is incorrect as it applies to linear motion, not angular motion. Option C, F = P/t, is incorrect as it represents power as force over time, which is unrelated to Newton's second law. Option D, All of the above, is incorrect because only one equation correctly represents the angular form of Newton's second law.
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