# Find the magnitude of the vector sum r of the vector displacements c and d ?

Find the magnitude of the vector sum r of the vector displacements c and d whose components in meters along three perpendicular directions are cx= 7.6, cy= -3.9, cz= -6.2; dx= 4.2, dy= -2.4, dz= 3.1;

### 1 Answer

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- andrewLv 71 month ago
Magnitude of the vector sum r

= √[(cx + dx)² + (cy + dy)² + (cz + dz)²

= √[(7.6 + 4.2)² + (-3.9 - 2.4)² + (-6.2 + 3.1)²]

= √188.54

≈ 13.73

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