Students will explore how changing gear ratios can increase the or decrease the propulsion they get from their propeller. This activity can also be done in conjunction with the Propulsion - prop size activity in this Underwater Robotics unit.

NOTE: The RCX should never be submerged in...

In this activity, design and construct an RCX tractor that is capable of pulling a heavy load across a floor. (NOTE: Gears will be needed.)

In this activity, design and construct an NXT car or snail which is capable of traveling extremely slowly. The cars compete in a snail race with the last car to cross the finish line crowned as the winner.

Students will explore gears and gear ratios. Students will learn how to use gears properly, efficiently and effectively.