In this activity, students complete a scavenger hunt in which they must take photos or videos exemplifying seven different situations involving force.
Students are assigned to groups of 2-3, and given a worksheet containing a list of seven situations involving forces (for example, static friction causing an object to accelerate). Students leave the classroom and attempt to find an example of each, taking a photo or video using their cell phones.
Students return to the classroom with their examples and present them to the instructor, who judges whether or not the example is satisfactory. If so, the instructor initials on their worksheet that they have taken the photo or video; if not students continue to search.
Once they have the photo or video, students complete a free body diagram corresponding to each photo or video, labeling the forces acting on the object. These can be brought to the instructor for feedback, then revised (as needed, or until the class ends).
Students learn to analyze real world situations within the framework of forces and free body diagrams.
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