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A chair of weight 115 N lies atop a horizontal floor; the floor is not frictionless. You push on the chair with a force of F = 38.0 N directed at an angle of 43.0^\circ below the horizontal and the chair slides along the floor.Using Newton's laws, calculate n, the magnitude of the normal force that the floor exerts on the chair.

Physics
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Using Newton's laws, calculate n, the magnitude of the normal force that the floor exerts on the chair.
what is n ?!
normal force

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Other answers:

The normal force must oppose all forces in the vertical direction because the chair doesn't move into the floor! \[0 = mg - F \sin(\theta)\]

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