Final answer:
The net force that accelerates an object on an inclined plane is the parallel component of the weight minus the force of friction.
Step-by-step explanation:
When an object rests on an inclined plane that makes an angle with the horizontal surface, the weight of the object can be resolved into components that act perpendicular and parallel to the surface of the plane.
The net force that accelerates an object on an inclined plane is the component of the weight that acts parallel to the plane, minus the force of friction. The force of gravity acting on the object is divided into two components: a force acting perpendicular to the plane (normal force) and a force acting parallel to the plane. The parallel component of the weight causes the object to accelerate down the incline.
If there is friction present on the inclined plane, the force of friction opposes the motion of the object and must be subtracted from the parallel component of the weight. The net force can then be calculated by subtracting the force of friction from the parallel component of the weight.