☆Grasp and understand measuring principle and method of acceleration of gravity.
☆Understand the relationship between simple pendulum vibration period and pendulum length.
☆Research acceleration of gravity.
☆Simple pendulum length: 1000mm (arbitrarily adjustable), pendulum ball diameter: 18mm.
☆Stroke of freely falling body: 1000mm, diameter: 10mm,
☆Photogate timing device: nine digit display, timing: 999.999999s, resolution ratio: 1μs.