Question #3597d

1 Answer
Morgan
Aug 2, 2017

||B||costheta is the projection of vecB along the direction of vecA.

Explanation:

The scalar (dot) product of vecA and vecB is defined by

vecA*vecB=ABcostheta

where A and B are the respective magnitudes of vecA and vecB and theta is the angle between vecA and vecB.

Introduction to Mechanics by Kleppner and Kolenkow

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