![]() Lesson 4: Troubleshooting the Drive Mechanism (90 min)-After the preliminary testing done in Activity 3, students systematically troubleshoot their designs, working toward an overall design that performs consistently. They must also decide how to attach a string to the lever arm and wrap it around one of the axles of the chassis. This involves creating a support structure and a drive mechanism, which is a lever arm. Lesson 3: Designing and Building the Lever and Tower (120-180 min)-Students design and build an arrangement for powering the model. Using only the given materials and no direct instruction, teams build a gravity cruiser chassis that rolls freely. Lesson 2: Building and Testing a Gravity Cruiser Chassis (45-90 min)-Students are organized into teams. They are introduced to the engineering design process and the scope of this design challenge: to build a gravity cruiser, figure out how it works in order to predict its behavior, and use this knowledge to design their own customized gravity cruisers that meet specific performance goals. ![]() Students discuss the requirements described in the letter. Lesson 1: Introducing the Gravity Cruiser (45 min)-Students receive a letter from a fictitious toy company, EarthToy Designs, inviting them to create their own gravity cruiser toy design based on specifications provided by the company. Lesson Plan Overview: Suggested 10 lessons over 15 days ![]()
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