# CoG center

Find the position of the center of gravity of a system of four mass points having masses, m

_{1}, m_{2}= 2 m1, m_{3}= 3 m1, and m_{4}= 4 m_{1}, 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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Our vector sum calculator can add two vectors given by their magnitudes and by included angle.

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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:

### Grade of the word problem:

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