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posted by ami on Sunday, August 22, 2010 at 6:38pm.

The components of a vector V can be written (Vx, Vy, Vz). What are the components and length of a vector which is the sum of the two vectors, V1 and V2, whose components are (5.0, 1.3, -15.0) and (2.3, -4.7, -1.0)?

Add the components for the vector sum You get (7.3, -3.4, -16.0) The length of any vector is the square root of the sum of the squares of the components.

Vx = 5.0+2.3 Vy = 1.3-4.7 Vz = -16 length = sqrt (Vx^2+Vy^2+Vz^2)

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