How to solve friction problems in grade 11 physics SPH3U (3 of 3)

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This is a video for grade 11 physics, SPH3U, where it shows how to solve a problem related to friction both static and kinetic.

A 12 kg box at rest requires a horizontal force of 47 N to start moving it. Once it starts moving, the same horizontal force makes the box accelerate at 1.1 m/s/s. Find (a) the coefficient of static friction and (b) the coefficient of kinetic friction.

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