ACTIVITY HEADER

 

Name of Activity Detective-Mechanical Engineering
Author Kirsten Jorgensen and Hannah Garflied
Keywords rube goldberg, mechanical, simple machines, gears, inclined planes, pulley, lever, wedgem screw
Subject Simple Machines
Grade Level 4, 5
Time 1 Hour Total, 2 Hours Total
Brief Description Lesson 3 of Detective Engineer: Intro to Different Types of Engineering unit – mechanical engineering.
Lesson Objectives: -understand what mechanical engineers do and design-become familiar with the different types of simple machines

-create a rube goldberg device

Materials Needed: LEGO Simple Machines KitExtra Lego Pieces

a few NXT touch sensors

Preparation and Set Up: Arrange students in pairs with 1 simple machine kit per group
Procedure Continuation on the “Detective” Story line that we are following in this unit. Give the next part of the crime. We sent some of the shrapnel  they filtered from the last week and determined that the bomb that exploded in the museum of science was a bomb that was triggered by a button next to the bomb. There were no finger prints on the trigger. Discuss how this is possible? eventually get to Rube goldberb device because they wouldn’t be blown up if they were a distance away and triggered the bomb. What kind of engineer could build this? First we have an open discussion on mechanical engineers-what they do and why this field is different from other types of engineering–moving parts, robotics etc. What is a rube goldberg device? How do they work. Open discussion about what a simple machine is, why we use them, why they’re helpful, what the different kinds are and what their specific uses are (write on board for reference later). Project: Create a rube goldberg device with 2 different simple machines that can trigger a button (NXT touch sensor) from across the desk — has to be far enough away so they don’t blow up Give students 10-15 minutes to develop an idea and have a plan before they start. Hand out simple machines kits  after it is confirmed that they have a relatively good idea of what they are going to build and assist students as needed (how to work a gear box and how to make the certain simple machines because a lot of them have never seen how gears work) Ended up using a second week for this project so they could finish. Had pairs present their projects to the class. Had them talk about their idea and which simple machines they used.
Extensions: If they finish early, try to have them implement a 3rd simple machine. (only 1 group finished early)
Umbrella Unit/Curriculum (if applicable) Detective Engineer: Intro to Different Types of Engineering
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