maxstmichel8621 maxstmichel8621

30-11-2020
Physics

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A box is pressed against a vertical wall by a force F which is directed horizontally. If the magnitude of F is the minimum required to hold the box at rest, what is its value

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moya1316 moya1316

04-12-2020

Answer:

F = mg /μ

Explanation:

For this exercise we define a coordinate system with the horizontal x axis and the vertical y axis, let's write the equilibrium equations for each axis

X axis

F -N = 0

F = N

Y axisy

fr - W = 0

fr = W (2)

the force and touch have the expression

fr = μ N

we substitute

fr = μ F

we substitute in 2

μ F = m g

F = mg /μ

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