physics
posted by pauleen .
(II) A grocery art with mass of 18 kg is pushed at constant speed along an aisle by a force F = 12 N. The applied force acts at a 20degree angle to the horizontal. Find the work done by each of the forces on the cart if the aisle is 15 m long.
Please help me solve step by step.

I tried to solve it.
No work done by gravity
No work done by normal
169.14 J by applied force
169.14J by the friction force
are those correct? 
correct.
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