Two packages at ups start sliding down the 20 degree ramp


Two packages at UPS start sliding down the 20 degree ramp shown in the figure. Package A has a mass of 5.50kg and a coefficient of kinetic friction of 0.210. Package B has a mass of 11.5kg and a coefficient of kinetic friction of 0.160.

How long does it take package A to reach the bottom?

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Physics: Two packages at ups start sliding down the 20 degree ramp
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