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Thepoint
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Homework Statement
A horizontal force of magnitude F = 150 N is used to push a box of mass m = 18 kg from rest a distance d = 8 m up a frictionless incline with a slope q = 32°.
a, b. and c I already have done
d) How fast is the box moving after this displacement? [Hint: Work-energy involves net work done.] v = m/s
Homework Equations
The Attempt at a Solution
the pushing force is countered by the factor of gravitational work
the component force is 18*9.8*sin32=93.47778
F=150N, so net force pushs the object is 150-93.47778=56.52224N
net force=ma
m=18, net force =56.52224 so a=3.14m/s^2
Vf^2=2as, s=8m
Vf=7.08815m/s
I have no clue what I did wrong. Any assistance would be great.