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Two packages at UPS start sliding down the 20. ramp shown in the figure. Package A has a mass of 5.0 kg and package B

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Two packages at UPS start sliding down the 20. ramp shown in the figure. Package A has a mass of 5.0 kg and package B has a mass of 12 kg. Package A is 2.0 m from the bottom of the ramp, as shown in the figure. The coefficient of kinetic friction between the packages and the ramp is 0.15. How long does it take for package A to reach the bottom? F . m 5 B A 2.0 m F ma = (2final) Cos (20) 20

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