Question

uple Choices Marks 1. Which one of the following statements conceming momentum is triei A) Momentum is a force B) Momentum is a scalar quantiry C) The SI unit of momentum is kg.m'/s D) The momentum of an object is always proaitive 1) Momentum and impulse are measured in the same units 2. A rock is dropped from a high tower and falls freely under the influence of gaviry. Which of the following statements concerning the rock as it falls is t resistance OniC rue? Neglect the effects of st A) The rock will gain an equal amount of momentum during each secund. D) The rock will gain an equal amount of momentum for each meter theough whch in fss 3. A stunt person jumps from the roof of a tall building, but no injury occurs bocause the peron B) The rock will gain an equal amount of kinetic energy during each second C) The rock will gain an equal amount of speed for each meter theagh which it falls E) The amount of momentum the rock gains will be proportional to the amount of ponential energy that it loses. lands on a large, air-filled bag. Which one of the following best describes why no injury occurs A) The bag provides the necessary force to stop the person. B) The bag reduces the impulsc to the person. 9) The bag increases the amount of time the force acts on the person and reduces the change momentum. D) The bag decrcases the amount of time during which the momentum in changing and nodaces the avcrage force on the person. E) The bag increases the amount of time during which the momennum is changing and redaces the average force on the person. 4. Jennifer is walking at 1.22 m/s. If Jennifer weighs S52 N, whar is the magnitade of her momentum A) 97.0 kg m/s 1B) 137 kg m/s C) 68 6 kg·m/s D) 672 kg m/s E) 951 kg m/s Page | 1

Answer 1

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