CoG center
Find the position of the center of gravity of a system of four mass points having masses, m1, m2 = 2 m1, m3 = 3 m1, and m4 = 4 m1, if they lie at the vertices of an isosceles tetrahedron. (in all cases, between adjacent material points, the distance is a=1. )
Correct answer:

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You need to know the following knowledge to solve this word math problem:
- statistics
- weighted average
- geometry
- analytic geometry
- vector
- solid geometry
- pyramid
- planimetrics
- Pythagorean theorem
- triangle
Units of physical quantities:
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