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xasuma
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Homework Statement
A woman at an airport is dragging her 9.0 kg suitcase at a constant speed by pulling a strapa at an angle of θ above the horizontal. She pulls the streap with a 24.0 N force, and the friction force on the suitcase is 7.5 N.
a)Draw a free body diagram of the suitcase
b)What angle does the strap make with the horizontal?
c)What normal force does the ground exert on the suitcase?
Homework Equations
Fa=cosθ-fk=0
The Attempt at a Solution
a) This is what I got. Should 7.5 N (friction) point directly to the left instead? If so, why? http://puu.sh/chxIH/b42d9f8b68.png
b) I think this might be it:
cosθ-fk=0
cosθ = 7.5N/24N
θ = cos^-1 (7.5/24)
θ = 71.79`
c) This is what I am trying:
n = mg sinθ
n= 9.0kg*9.8m/s*sin71.79`
n= 83.78NPlease let me know if something is wrong/how to fix it. Thank you
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