Which type of frictional force is
exerted between two surfaces in relative
motion?
A. Rolling friction
B. Kinetic friction
C. Static friction
D. Limiting friction
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Ans. B
Sol. Kinetic friction is a force that acts
between moving surfaces. An object that
is being moved over a surface will
experience a force in the opposite
direction as its movement. The
magnitude of the force depends on the
coefficient of kinetic friction between
the two kinds of material.
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