In an angular motion, Newton's second law of motion is_____________?
Correct answer: C. Στ = I α
- A. F=ma
- B. F=τp/It
- C. Στ = I α
- D. All above
Explanation
The rotational form of Newton’s second law is Στ = Iα, where torque is the rotational equivalent of force, moment of inertia is the rotational equivalent of mass, and angular acceleration is α. Thus option c is the correctly stated angular law. Students may choose F = ma because it is the linear form, not the angular form requested.
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