What technology measures ground force?

• A. Launch monitors
• B. High-speed cameras
• C. Radar
• D. Pressure plates

Answer: (D)

Ground force is the reaction force the ground exerts on you as you push off and land during a swing. Pressure plates are placed at the foot-ground interface and record how pressure is distributed under each foot over time, giving a direct readout of how weight loads and transfers through the feet. This provides a clear picture of the ground reaction pattern—the timing, magnitude, and balance between feet—which is exactly what you need to understand ground forces. Other options focus on the ball or body motion (ball flight, swing speed, movement) and don’t capture the contact forces at the ground. So pressure plates give the most direct and useful measurement of ground force among the choices.