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Friction, Air Resistance, and Drag
Worksheet
Grade Level
Physical Science with Earth and Science
9.49 Friction, Air Resistance, and Drag
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A student uses the model kinetic friction = coefficient times normal force. Which limitation of this model should the student remember?
A
It does not include effects such as lubrication, surface deformation, heating, or air drag.
B
It shows drag and friction are exactly the same in every situation.
C
It proves friction always points in the direction of motion.
D
It works only when there is no normal force.
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