Julie carries an 8.0-kg suitcase as she walks 18 m along an inclined walkway to her hotel room at a constant speed of 1.5 m/s. The walkway is inclined 15 degrees above the horizontal. How much work does Julie do in carrying her suitcase?

Answer 1

18m*sin15* M * g = ___ J

That does not count her work carrying herself, which is much more.

Her speed does not matter. That information is there to fool you.

Answer 2

W=Fcos(th)s
where F is force, th is the angle between the displacement and the force, and s is the displacement.
recall
F=ma
since her speed is constant,
a=0
therefore
F=0
therefore
W=0

Answer 3

zero joules