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QUESTION
Two packages at UPS start sliding down the 20 ramp shown in the figure. Package A has a mass of 4.00kg and a coefficient of kinetic friction of 0....
Two packages at UPS start sliding down the 20∘ ramp shown in the figure. Package A has a mass of 4.00kg and a coefficient of kinetic friction of 0.200. Package B has a mass of 12.0kg and a coefficient of kinetic friction of 0.160. How long does it take package A to reach the bottom?
