The rate of change of momentum for a freely falling object is always:
Correct answer: A. = mg
- A. = mg
- B. > mg
- C. < mg
- D. Zero
Explanation
The correct answer is that the rate of change of momentum for a freely falling object is always equal to its weight, mg. This is due to the fact that the only force acting on the object is gravity, which provides an acceleration g with mass m, resulting in a force of mg. Option A is correct because it accurately represents this scenario.Options B and C are incorrect because the rate of change of momentum cannot exceed or be less than mg in free fall, as no other forces are acting. Option D is also incorrect because the rate of change of momentum is not zero due to the continuous gravitational influence.
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Displacement, velocity and acceleration describe motion, including the horizontal and vertical components of projectile motion. The chapter connects these quantities with Newton's laws, momentum and impulse, then applies conservation of momentum to collisions, distinguishing elastic collisions from inelastic ones.
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