1. The problem statement, all variables and given/known data A woman at an airport is towing her 20.0-kg suitcase at constant speed by pulling on a strap at an angle θ above the horizontal (Fig. P5.40). She pulls on the strap with a 35.0-N force. 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? 2. Relevant equations F - fk = ma W = mg 3. The attempt at a solution (a) F - fk = ma 35.0 N – 20.0 N = (20.0 kg)(sinѲ)(9.8 m/s2) sinѲ = (15.0 N) / (20.0 kg)(9.8 m/s2) Ѳ = sin-1[(15.0 N) / (20.0 kg)(9.8 m/s2)] Ѳ = ° (b) W = mg W = (20 kg)(9.8 m/s2) W = 196 N I don't know if what I attempted was even on the right path. Could someone point me in the right direction? Thanks!