1.

A vehicle is moving up on an inclined plane. The vehicle has rear-wheel drive. Force of friction on the rear wheels will be in a direction

A. along the plane but backward
B. backward at an angle φ with the plane, where φ is the friction angle
C. along the plane but forward
D. forward at an angle φ with the plane, where φ is the friction angle
Answer» D. forward at an angle œÜ with the plane, where œÜ is the friction angle


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