A block of mass M is moving on a
rough horizontal surface. PR is the
coefficient of kinetic friction between
the block and the surface. What is the
net force exerted by the surface on the
block?
M
m
(a) Mg
O
(b) pMg
(C) Mg/1+ uŹ
(d) Mg 1-H%
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Answer
mg1+μ2−−−−−√
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