 Rigid body dynamics - Rigid body linear momentum: Encyclopedia II - Rigid body dynamics - Rigid body linear momentumThe equation for particle linear momentum is
where:
m is the particle's mass.
v is the particle's velocity.
fi is one of the N forces acting on the particle.
Assuming constant mass, this reduces to
To generalize, assume a body of finite mass and size is composed of such particles. There exist internal forces, acting between any two particles, and external forces, acting only on the outside of the mass. Each particle has:
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