The force of friction, f f, opposes the motion of the object, so it acts upward along the plane. It is important to be careful when resolving the weight of the object into components. If the angle of the incline is at an angle θ θ to the horizontal, then the magnitudes of the weight components are

a moving object continues to move. the driving force from the engine is balanced by resistive forces such as air resistance. and friction in the car's moving parts. The resultant force on the.