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Q5. A tool box of mass 300 kg is dragged at steady speed up a ramp inclined at 20° above the horizontal. The force used to drag the box is 1600 N and it is acting horizontally.

(a) Sketch the ramp and box showing all forces acting.

(b) Calculate EACH of the following:

(i) The coefficient of friction between the box and the ramp;

(ii) The minimum force that could be used to move the box and its line of action measured from the horizontal.