Single class period (< 90 mins)
Out of class, individual students find an image of interest with two or more interacting objects. They prepare free-body diagrams of the objects in the images. Both the images and free-body diagrams are uploaded to an online collaborative platform. They write a short reflective piece on how the phrase "for every action, there is an equal and opposite reaction" applies to their image.
In class, students are assigned to groups; each group selects a single image that has been uploaded to work with. The groups prepare free-body diagrams for the objects in the images in the case when acceleration is ...
Read More +Out of class, individual students find an image of interest with two or more interacting objects. They prepare free-body diagrams of the objects in the images. Both the images and free-body diagrams are uploaded to an online collaborative platform. They write a short reflective piece on how the phrase "for every action, there is an equal and opposite reaction" applies to their image.
In class, students are assigned to groups; each group selects a single image that has been uploaded to work with. The groups prepare free-body diagrams for the objects in the images in the case when acceleration is zero. They then present their results to the class for peer review. The groups prepare free-body diagrams for the objects in the case when acceleration is non-zero. They write a statement comparing and contrasting the forces in the free-body diagrams in two cases of zero and non-zero acceleration. Finally they prepare a short written heuristic on identifying 3rd Law force pairs.
Finally, the groups present their free-body diagrams, statements and heuristics to the entire class for peer review and feedback from the instructor.
Read Less -The objective of this activity is to understand and identify 3rd Law force pairs. Students prepare free-body diagrams from relevant images they have selected and then compare them in the accelerating and non-accelerating state.
Published: 18/09/2018
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