Selecting Gears for VEX robots



Students need to be able to choose appropriate gears to achieve desired speeds in their robots. This lesson will introduce students to gear ratios and how they affect speed and torque. Effects of different gear ratios will be demonstrated using small inexpensive robot kits. Students will receive direct instruction on gear ratios and then use the information to choose the optimal gearing to complete a VEX robot. Assessment will be on how well student robots perform in time trials (VEX is a specific brand of educational robot) This lesson can be modified to work with other educational robots by acquiring brand specific data.

Lesson Time

One class period
90 Minutes

Industries / Subjects / Grades

Industries / Pathways
  • Engineering & Architecture Engineering & Architecture

Standards and Objectives


California Academic Content Standards (5)
California's 2008 CTE Standards (4)

Related Instructional Objectives (SWBAT...)

  • Students will use mathematics to make appropriate choices of gears to power a robot
  • Students will build a VEX robot using the selected gears
  • Students will asses robot performance against predicted performance

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