OVERVIEW This series of exercises uses an engine hoist, four scales, and an engine block to allow students to predict (calculate) reactions and then measure them. This develops students’ confidence in their ability to calculate reactions and provides a great opportunity for “what if?” exercises. PRINCIPLE Reinforces static equilibrium and moment of a force. We […]
Model Description Introduce Varignon’s theorem to students as a simple way to determine the moment about a point. This demonstration should take 5-7 minutes. Engineering Principle Varignon’s Theorem states that the moment of a force is equal to the sum of the moments of that force’s components about the same point. where is the perpendicular […]
Model Description This training aid provides an example of what the students already know intuitively about mechanical advantage and applied moment. By using a dial torque wrench, units and physical measurement are readily observable and subject to discussion. This demonstration should take 5 minutes. Engineering Principle What You Need Item Quantity Description/Clarification Secure Bolt (Fig. […]
Model Description Use this daunting looking model to set the stage for a lesson on 3-D equilibrium and eventually persuade your students that it’s easier than it looks! This demonstration should take 20 minutes. Engineering Principle 3-D equilibrium for a non-concurrent force system requires the simultaneous solution of six equations of equilibrium, three equations for […]
Model Description Introduce the concept of Moment and couples to your students by providing hands-on examples that they can relate to. Demonstrate how levers use the concept of moment to provide a mechanical advantage. This demonstration should take 5-10 minutes. Engineering Principle The Moment caused by a force about any point is defined by the […]
Model Description Introduce Varignon’s theorem to students as one way to determine the moment about a point. Show how moments are free vectors. This demonstration should take 10 minutes. Engineering Principle Varignon’s Theorem states that the moment of a force is equal to the sum of the moments of that force’s components about the same […]