Final answer:
The word 'weight' in the context of an inclined plane refers to the parallel component of the gravitational force acting on an object, which is expressed as W∥ = Wsin(θ).
Step-by-step explanation:
The word "weight" in the question refers to the force due to gravity acting on an object. When an object rests on an inclined plane, the force of gravity creates two components of weight: one perpendicular to the plane and one parallel to the plane.
The expression for the component of the object's weight force that is parallel to the incline is given by W∥ = Wsin(θ), where W is the total weight of the object and θ (theta) is the angle of the incline with the horizontal. This relationship is derived from basic trigonometry using the right triangle formed by the weight vectors.