Last Updated：2025/11/20
(physics) The ratio between (1) the magnitude of the force of friction which a surface produces on an object (moving along the surface or being pressed statically against it) and (2) the magnitude of the normal force which is produced by the surface on the object and which is perpendicular to that surface.
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coefficient of friction
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Source Word
coefficient of friction
Noun
(physics)
The
ratio
between
(1)
the
magnitude
of
the
force
of
friction
which
a
surface
produces
on
an
object
(moving
along
the
surface
or
being
pressed
statically
against
it)
and
(2)
the
magnitude
of
the
normal
force
which
is
produced
by
the
surface
on
the
object
and
which
is
perpendicular
to
that
surface.
Japanese Meaning
摩擦係数：接触面において、物体に働く摩擦力（運動している場合や静止状態で押された場合に発生する力）と、それに対して垂直に働く法線力（接触面が物体に及ぼす垂直方向の力）との比率を表す数値。
Sense（1）
(physics)
The
ratio
between
(1)
the
magnitude
of
the
force
of
friction
which
a
surface
produces
on
an
object
(moving
along
the
surface
or
being
pressed
statically
against
it)
and
(2)
the
magnitude
of
the
normal
force
which
is
produced
by
the
surface
on
the
object
and
which
is
perpendicular
to
that
surface.
（ plural ）
