Force of friction of this cart on wheels with a motor driven propeller

[jenn3999]

can anyone show me how to solve this problem?


a cart on wheels with a mass of 250 g has a motor driven propeller with a force P of .3 N, and it moved down an incline of 30 degrees with an acceleration of 3.5 m/s^2.

What is the force of friction ?

determine coefficient of friction

 

[JonnyA42]

1) Determine the net force acting on the cart (you know its mass and its acceleration)
2) Draw a free body diagram; what forces are responsible for this net force?
3) Solve for Friction Force and then mu