MINDSTORMS EV3 Core Set

Make It Move Up An Incline

Design, build and program a robot that can move itself up an incline as steep as possible.

90-120 min.
Intermed.
Key Stage 3

Connect

(30 minutes)

Use this video to:
• Connect students to real-life robots that move;
• Connect students to physical science and mathematics principles: distance, speed, energy and power systems; balance, stability and centre of mass; patterns of movement and coordinate systems; energy transfer; incline slope and other challenges for robot movement;
• Consider how robots think: how they know where they are and what they need to do;
• Inspire students to create their own robots that move.

Make It Move Discussion

1. Look at the ways that machines and robots move without wheels. Choose one example and trace how the movement transfers from one part to another.

This question challenges students to observe and describe how a robot physically moves and how to use physical science vocabulary such as power, energy, work, centre of mass and stability.
2. Compare the way the two walking robots move. What do you notice about how they balance as they walk?
The ZI insect robot lifts one leg on one side but not on the other. The humanoid robot is maintaining her balance in several ways (e.g., moving slowly, adjusting foot position, holding hands out and down to the side).

Design Brief
Design, build, and program a robot that can move itself up an incline as steep as possible.

Brainstorm
Encourage an active brainstorming process so that students develop their conceptual understanding. For example, encourage them to:
• Review the Robots In Action videos showing robots for inspiration;
• Investigate the Key Concepts Measuring Distance and Measuring Speed projects using the building and programming ideas included there, especially the example of using gears;
• Build the suggested examples from Building Ideas and explore how they work;
• Personalize their robot or describe a context in which a robot that moves up an incline is important (e.g. notice the NASA Mars Curiosity rover that is being tested on an incline in the Make It Move Video).

See Building Ideas:

Select the Best Solution
Describe the solution that you have agreed to build and program.

Think about examples from your brainstorming discussion. Then explain why you chose this solution for the design brief. Encourage students to describe why they have chosen this solution. That way, when students are reviewing and revising, they will have some specific information to use to evaluate their solution and decide whether it was effective or not.

Construct

(30 minutes)

Build and Program

As you work on your solution, use this log page to:

1. Describe one part of your design that worked especially well.
2. Describe one design change that you had to make.
3. Explain what you will try next.

As you test your design solution, use the table on the next two pages for collecting and recording your findings.

Contemplate

(30 minutes)

Test and Analyze
How well does your solution satisfy the design brief?
Use this page to record your data. Name the columns and rows, such as Trial Number, Incline Angle, Gear Ratio, Motor Power, Time Indicator and Observations.

Review and Revise
Take a moment to reflect on your robot solution.

• Does the robot move up the incline easily or with difficulty?
• Have you tested a range of settings to optimise the motor power?
• What are some ways that others have solved the problem?

Encourage students to look back at the design brief and at their own brainstorming notes and test data. Encourage a peer-review process so that each group is responsible for evaluating their own and others' projects. This review process can help students develop skills in giving constructive feedback as well as sharpening analysis skills and the use of objective data to support an argument.

Communicate
Here are some ideas to suggest to students:

• Create a video of your project, especially your final presentation and robot performance;
• Explain some important features of your software program;
• Produce a building guide of your model by taking a series of photographs as you deconstruct it;

Continue

(30 minutes)

Communicate
Here are some ideas to suggest to students:

• Create a video of your project, especially your final presentation and robot performance;
• Explain some important features of your software program;
• Produce a building guide of your model by taking a series of photographs as you deconstruct it;

Sample Solution Overview

The Gear Bot Solution is one example of many possible solutions for the Make It Move Up An Incline project.

Sample Solution Building Ideas
This Gear Bot Solution combines these Building Ideas: Ball Wheel, EV3 Frames and Gear Down.

Example Solution Program

This program:

• Turns on Motors B and C forward at full power for 13 seconds.

This motor is geared down using a 0.33:1 ratio. This means that the driver gear must turn three times to turn the follower gear once. This gear construction increases the mechanical advantage of the motor by 3: the motor has three times the force with the gearing than without the gearing.

Teacher Support

Students will:
• Build and program their own robot to move up an incline as steep as possible;
• Understand that the speed and power of a machine can be changed using mechanical and electrical power;
• Understand that incline can be measured by rise over run or by slope.

LEGO® MINDSTORMS Education EV3 Core Set
LEGO® MINDSTORMS Education EV3 Lab or EV3 Programming

Prerequisites
Students should know how to create and download a program, and how to program a motor.

Pupil Material

Student Worksheet

Download, view or share as an online HTML page or a printable PDF.