The "Slope Force Decomposition Demonstration Instrument" is a teaching tool designed specifically for physics classrooms in middle schools and universities. It visually displays the decomposition process of gravity on a slope (parallel and vertical components), and synchronously measures friction, inclination, and normal pressure. Experimental example: The teacher locks the slope at 30 °, the slider is stationary, and the screen displays F ∥=0.50 mg and F ⊥=0.87 mg. Students predict how F will change when θ increases to 45 °; Teachers can adjust angles with just one click, refresh data curves in real-time, and verify hypotheses. Replace the low friction plate, repeat step 2, compare the critical angle from 33 ° to 18 °, and guide students to determine the relationship between μ s and material.