Thursday, August 28, 2008

Angular Momentum - July Dec Revision

Principle of conservation of angular momentum

If the total external torque in a system is zero, its angular momentum remains constant.

Angular momentum of a particle about a point O is defined as

l = r × p

p = linear momentum
r = position vector of the particle from the given point O.

The angular momentum of a system of particles is the vector sum of the angular momenta of the particles of the system.

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