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Physics Force & Laws Of Motion Level: High School

A women at an airport is towing her 20.0 kg suitcase at constant speed by pulling on a strap at an angle theta above the horizontal . She pulls on the strap with a 35.0 N force , and the friction force on the suitcase is 20.0 N . Draw a free-body diagram of the suitcase .

(a) What angle does the strap make with the horizontal ?

(b) What normal force does the ground exert on the suitcase ?