the diagram shows a 15-kg box resting on a wedge which has an angle of inclination of 30° and a coefficient of friction of 0.15. which equation correctly gives the value of ff, the force due to friction?
a) ff = 0.15fn
b) ff = 0.15fg
c) ff = 0.15f||
d) ff = 0.15f||f⊥

there are no correct statementd on the list of choices you provided.

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