Question: Problem 1.5.9. A cord is attached to a 3.9 kg box, and pulls upward on the box at an angle of 32 relative to

Problem 1.5.9. A cord is attached to a 3.9 kg box, and

Problem 1.5.9. A cord is attached to a 3.9 kg box, and pulls upward on the box at an angle of 32 relative to the horizontal. The tension in the cord is 21 N, but the box remains at rest. Determine (a) the normal force, and (b) the static frictional force.

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