Special Features
Determine g, investigate air resistance dependance on mass, volume, cross-sectional area. Includes drop box, control cable, control box, ac adaptor, time-of-flight receptor pad, times switch release washer (10), release cables for attaching washers to object (50) , small nylon ball, large plastic ball, golf ball, hollow galf ball, 1 in steel ball, 5/8 in steel ball.
