Activity #4: Gear Ratio Gear ratio can be defined as [the number of turns of the driver] : [number of turns of the follower]. In this activity, students will determine the gearing ratios for different combinations of the 8t, 16t, 24t, and 40t gears. This can be done using simple mathematics. For example, a 20t gear driver and a 40t gear follower produce a gear ratio of 2:1. In other words, the 20tooth gear must make 2 complete rotations to turn the 40tooth gear 1 time. Materials: 8, 16, 24, 40 tooth LEGO gears, three LEGO axles, one 11 hole LEGO beam, 6 gray fasteners, one red marker or pencil. Procedure:






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