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An 8.0-newton wooden block slides across a horizontal wooden floor at constant velocity. What is the magnitude of the force of kinetic friction between the block and the floor? (1) 2.4 N (3) 8.0 N (2)
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An 8.0-newton wooden block slides across a

horizontal wooden floor at constant velocity.
What is the magnitude of the force of kinetic
friction between the block and the floor?
(1) 2.4 N (3) 8.0 N
(2) 3.4 N (4) 27 N

User Zoltan Hernyak
by
8.2k points

1 Answer

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If the block is sliding at constant velocity then its speed is constant. That means it is not losing any kinetic energy. There is no friction acting and the coefficient of kinetic friction is zero. Sadly, that choice of answer is not offered.
User John Mill
by
8.0k points
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