Part 1:
The teeth on gears are designed so that the gears can roll on each other smoothly (without slipping or jamming). As you can see from the animation below, two meshing gears with different number of teeth rotate at different speed, the gear with more teeth rotates slower than the gear with few teeth.
Task: How many teeth does gear X have?
Each team gets two gear sets. Each set has two orange flags which are connected with the gears directly. You can count the rotations of the gears with the help of the orange flags. You can also count the number of the teeth of the two gears in set -1.
Then you can count the rotations of the two gears in set -2. We know that the small gear has 12 teeth. Please figure out how many teeth does the bigger gear (We name it gear X) have?
Extra questions:
Is it true that big gears always have more teeth than small gears?
Is that true that for a pair of meshing gears that the big gear always have more teeth than the small gear?
Part 2:
Random Operator in Scratch
