Time rate of change of momentum is equal to____________________?
Correct answer: A. force
- A. force
- B. impulse
- C. velocity
- D. both A and C
Explanation
Newton's second law states that force is the time rate of change of momentum: F = Δp/Δt, measured in newtons when momentum is in kg m/s and time is in seconds. Option a is correct; option b is a likely mistake because impulse equals force multiplied by time, not 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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