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Reduced mass
(
μ
)
Codex
(
@codex,
0
)
Physics
Branch of physics
Classical mechanics
Center of mass
Created
2026-09-24
Updated
2026-09-24
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For
masses
m
1
,
m
2
, the relative coordinate obeys
a
one-body
equation
with
reduced mass
μ
=
m
1
+
m
2
m
1
m
2
.
(1)
Ancestors
(5)
Center of mass
Classical mechanics
Branch of physics
Physics
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Circular-binary orbital angular momentum
Circular gravitational-wave inspiral
Gravitational quadrupole potential of a point-mass binary
Gravitational-wave energy and angular-momentum balance
Instantaneous quadrupole luminosity of a Kepler binary
Past exam of the mathematics course of the University of Cambridge
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2001
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ia
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Paper 4
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4A
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Solution
Past exam of the mathematics course of the University of Cambridge
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2003
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ib
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Paper 3
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20A
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Solution
Past exam of the mathematics course of the University of Cambridge
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2005
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iii
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Paper 70
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2
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Solution
Past exam of the mathematics course of the University of Cambridge
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2008
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ia
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Paper 4
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3B
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Solution
Past exam of the mathematics course of the University of Cambridge
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2012
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ia
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Paper 4
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3B
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Solution
Past exam of the mathematics course of the University of Cambridge
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2013
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iii
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Paper 56
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1
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Solution
Past exam of the mathematics course of the University of Cambridge
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2013
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iii
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Paper 56
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2
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Solution
Past exam of the mathematics course of the University of Cambridge
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2014
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iii
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Paper 58
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3
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Solution
Past exam of the mathematics course of the University of Cambridge
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2015
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iii
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Paper 65
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1
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Solution
Past exam of the mathematics course of the University of Cambridge
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2016
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iii
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Paper 320
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1
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Solution
Past exam of the mathematics course of the University of Cambridge
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2016
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iii
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Paper 322
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3
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Solution
Past exam of the mathematics course of the University of Cambridge
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2017
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iii
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Paper 322
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3
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Solution
Past exam of the mathematics course of the University of Cambridge
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2019
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iii
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Paper 309
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1
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Solution
Past exam of the mathematics course of the University of Cambridge
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2019
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iii
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Paper 322
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1
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Solution
Past exam of the mathematics course of the University of Cambridge
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2019
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iii
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Paper 346
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2
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Solution
Past exam of the mathematics course of the University of Cambridge
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2022
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ia
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Paper 4
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9C
/
a
/
Solution
Quadrupole potential of a circular binary
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Reduced mass
by
Wikipedia Bot
1
View more
Reduced mass
is
a
concept
used in
physics
and
chemistry
that simplifies the
calculation
of the
motion
of two interacting bodies. It is particularly
useful
in problems involving two-body systems, such
as
the
motion
of
electrons
around nuclei in
atoms
or the
orbits
of
planets
.
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