Slanted Surfaces with Friction: the Figure Shows Two Packages That

Slanted surfaces with friction: The figure shows two packages that start sliding down a 20° ramp from rest a distance along the ramp from the bottom. Package A has a mass of 5.0 kg and a coefficient of kinetic friction 0.20 between it and the ramp. Package B has a mass of 10 kg and a coefficient of kinetic friction 0.15 between it and the ramp. How long does it take package A to reach the bottom?

A) 2.7 s
B) 3.0 s
C) 3.2 s
D) 3.5 s

Correct Answer:

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