A particle in three-dimensional motion has instantaneous velocity

PHYSICS · Subjective · CBSE · Physics · Motion in a Plane · Motion in a Plane

Problem

A particle in three-dimensional motion has instantaneous velocity v=3 ı^−4 ȷ^+12 k^  m/s\mathbf v = 3\,\hat\imath - 4\,\hat\jmath + 12\,\hat k\;\text{m/s}. Calculate its instantaneous speed.

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