A woman at an airport is towing her 14.0-kg suitcase at constant speed by pulling on a strap at an angle ? above the horizontal. She pulls on the strap with a 39.5-N force, and the friction force on the suitcase is 20.0 N.
(a) What angle does the strap make with the horizontal?
°
(b) What is the magnitude of the normal force that the ground exerts on the suitcase?
N