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Physics
Physics
Problem
Which of the following gives the magnitude of the kinetic friction force acting on a block of mass
m
m
m
that slides on a horizontal surface with coefficient of kinetic friction
μ
k
\mu_k
μ
k
? a)
μ
k
2
m
g
\mu_k^{2} m g
μ
k
2
m
g
b)
m
g
μ
k
\dfrac{m g}{\mu_k}
μ
k
m
g
c)
μ
k
m
g
\mu_k m g
μ
k
m
g
d)
m
g
m g
m
g
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