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A woman at an airport is towing her 25.0 kg suitcase at constant speed by pulling...

A woman at an airport is towing her 25.0 kg suitcase at constant speed by pulling on a strap at an angle θ above the horizontal. She pulls on the strap with a 50.0 N force and the friction force on the suitcase is 25.0 N. What angle does the strap make with the horizontal? What is the magnitude of the normal force that the ground exerts on the suitcase?

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