Question #3597d

1 Answer
Aug 2, 2017

Answer:

#||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