06_P20InstructorSolution - 6.20. Model: Visualize: We...

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6.20. Model: We assume that the truck is a particle in equilibrium, and use the model of static friction. Visualize: Solve: The truck is not accelerating, so it is in equilibrium, and we can apply Newton’s first law. The normal force has no component in the x -direction, so we can ignore it here. For the other two forces:
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