Asked by cheryl
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?
Answers
Answered by
drwls
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.
That does not count her work carrying herself, which is much more.
Her speed does not matter. That information is there to fool you.
Answered by
Heather
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
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
Answered by
jubai
zero joules