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  • 20-11-2019
  • Physics
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How do you do this question?

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MathPhys
MathPhys MathPhys
  • 20-11-2019

Explanation:

The box has no acceleration in the perpendicular direction, so the net force in that direction is 0.

Sum of forces in the parallel direction:

∑F = f − F∥ − mg∥

∑F = f − F cos φ − mg sin θ

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