The dimension of force is__________________?
Correct answer: B. MLT-2
- A. MLT-1
- B. MLT-2
- C. ML-1T
- D. ML-1T-2
Explanation
Newton’s second law gives F = ma, so force has dimensions M × LT^-2 = MLT^-2. Option a is the dimension of momentum, ML T^-1, which students may choose when they confuse force with the rate of change of momentum.
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About Newton's Laws of Motion
Newton’s laws explain inertia, the relation between net force and acceleration, and action-reaction pairs. Questions involve free-body diagrams, balanced and unbalanced forces, F = ma, force as the rate of change of momentum, and identifying genuine third-law pairs, which act on different bodies.
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