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For two particles where The total momentum P at some instant equals the total momentum P’ at some other instant. 10.2 CENTER OF MASS
CM x1 x2 Three particles
r1 m1 m2
r2 r3 m3 ∑
∑ Multiple particles ∑
∑ or ∑
∑ Continuous Distribution of Masses Centroid of a triangle
Similarly Center of mass of a pyramid For a system of particles, the total gravitational potential energy is 10.3 THE MOTION OF THE CENTER OF MASS 10.4 ENERGY OF A SYSTEM OF PARTICLES...
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