Long description: Fig18P

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A block resting on an inclined plane with forces labeled, showing the normal force and weight.

Alt text: A block resting on an inclined plane with forces labeled, showing the normal force and weight.

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  • The image displays a block positioned on an inclined plane set at an angle \(\alpha\) with respect to the horizontal.
  • A coordinate system is shown originating near the block, with the \(\hat{y}\) unit vector pointing up the incline and the \(\hat{k}\) unit vector pointing perpendicular (or normal) to the incline's surface.
  • Three forces are drawn acting on the block: \(\mathbf{N}\), which is drawn perpendicular to the incline, representing the normal force; \(\mathbf{W}\), which points vertically downward, representing the weight of the block; and the coordinate system axes indicate the reference frame for analyzing these forces.

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