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6. a) When purchasing a sh by weight in an elevator, is it preferrable to do so while the elevator car is accelerating upwards, stationary,

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6. a) When purchasing a sh by weight in an elevator, is it preferrable to do so while the elevator car is accelerating upwards, stationary, moving with a constant speed, or accelerating downwards? Why? .1 i; .h L'- b) Use Newton's second law to show the sum of forces on the elevator car c) What is Newton's second law

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