Multiple Choice
A block A with mass is pushed across a horizontal tabletop with a constant velocity by a horizontal force of magnitude . What is the coefficient of kinetic friction between block A and the tabletop?
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7. Friction, Inclines, Systems
Kinetic Friction
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In the context of kinetic friction between two sliding solid surfaces, which method is most likely to reduce the kinetic friction force?
A
Roughen both surfaces by sanding them
B
Apply a lubricant (e.g., oil) between the surfaces
C
Increase the contact area while keeping the normal force the same
D
Increase the normal force pressing the surfaces together
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