The Effect of Unbalanced Force on Velocity
The Effect of Unbalanced Force on Velocity
Objectives
In this lesson, students will examine a situation where they can gauge the relationship of force and motion in two vectors. One of the vectors (gravity) is known in advance, while the other will be measured as a ratio of the first. Students will:
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identify the relationships between force and motion.
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learn that vectors of force and motion are independent of each other.
Essential Questions
Vocabulary
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Force: Action that accelerates an object.
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Acceleration: The rate of change of velocity of an object over time.
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Velocity: An object’s rate of change of position (speed) in a direction.
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Terminal Velocity: The speed at which resistance (especially air resistance) balances acceleration (especially the acceleration of gravity).
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Vector: Force with a direction, with values for both force and direction.
Duration
45 minutes/1 class period
Prerequisite Skills
Materials
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electric fan
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table tennis ball
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meter ruler
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graph paper (S-7-1_Graph Paper.doc)
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Internet access
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TV/monitor to show Internet video to students
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Related Unit and Lesson Plans
Related Materials & Resources
The possible inclusion of commercial websites below is not an implied endorsement of their products, which are not free, and are not required for this lesson plan.
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Lost Moon, The Perilous Voyage of Apollo 13 by Jim Lovell and Jeffrey Kluger. Houghton Mifflin, 1994.
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Apollo 13 Video: http://dsc.discovery.com/videos/classic-nasa-film-apollo-13-1.html
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Short demonstration of gravity’s effect on horizontal movement: https://www.youtube.com/watch?v=77GSO3NCWwg
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Mythbusters Bullet Fired Dropped #1:
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Mythbusters Bullet Fired Dropped #2: https://www.youtube.com/watch?v=D9wQVIEdKh8
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Additional Resources: http://phet.colorado.edu/simulations/index.php?cat=Physics
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NASA Trajectory Design Model: http://www.nasa.gov/multimedia/imagegallery/image_feature_779.html