Student will be able to:

1. Explain the behavior of a two-gear gear train

2. Calculate the gear ratio of a two-gear gear train

3. Describe gearing-up and gearing-down in terms of speed and power

Published on *STEMRobotics* (http://stemrobotics.cs.pdx.edu)

Overview:

The goal of this lesson is to explore the use of gears to tradeoff between speed and power(torque) in a robot design. Students learn about gearing up, gearing down and calculating gear ratios. There is also an extended lesson on compound gear ratios for advanced students.

Objectives:

Student will be able to:

1. Explain the behavior of a two-gear gear train

2. Calculate the gear ratio of a two-gear gear train

3. Describe gearing-up and gearing-down in terms of speed and power

Instruction Guide:

Getting in Gear [1]

Primary Instructional Material:

Getting in Gear [2]

Differentiated Instruction Material: Alternative:

Differentiated Instruction Material: Extended:

Differentiated Instruction Material: Supplemental:

Education Level:

Middle School [11]

High School [12]

Scope & Sequence:

Mathematics [13]

Focus Subject:

Engineering [14]

Mathematics [15]

HW Platform:

NXT [16]

SW Platform:

Any [17]

Interactivity Style:

Mixed [18]

Clone Of:

Getting in Gear [19]

**Links:**

[1] http://stemrobotics.cs.pdx.edu/node/527

[2] http://stemrobotics.cs.pdx.edu/node/529

[3] http://stemrobotics.cs.pdx.edu/node/907

[4] http://stemrobotics.cs.pdx.edu/node/530

[5] http://stemrobotics.cs.pdx.edu/node/813

[6] http://stemrobotics.cs.pdx.edu/node/948

[7] http://stemrobotics.cs.pdx.edu/node/1100

[8] http://stemrobotics.cs.pdx.edu/node/531

[9] http://stemrobotics.cs.pdx.edu/node/532

[10] http://stemrobotics.cs.pdx.edu/node/906

[11] http://stemrobotics.cs.pdx.edu/taxonomy/term/40

[12] http://stemrobotics.cs.pdx.edu/taxonomy/term/41

[13] http://stemrobotics.cs.pdx.edu/taxonomy/term/144

[14] http://stemrobotics.cs.pdx.edu/focus-area/engineering

[15] http://stemrobotics.cs.pdx.edu/focus-area/mathematics

[16] http://stemrobotics.cs.pdx.edu/target-hardwareplatform/nxt

[17] http://stemrobotics.cs.pdx.edu/target-software-platform/any

[18] http://stemrobotics.cs.pdx.edu/taxonomy/term/26

[19] http://stemrobotics.cs.pdx.edu/node/528