### What is the direction of the force of the air resistance

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A 700lbf prefabricated slab is being lifted up by a crane at a constant velocity. The crane pulls on the slab with a force of 4000N at an angle of 20o to the left of vertically upward. The only other force acting on the slab is the force of air resistance. What is the magnitude of the force of the air resistance? What is the direction of the force of the air resistance?

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