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# Mechanics: Scalars and Vectors

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1. Given the following 3 vectors, all of which lie in the horizontal plane, (see attachment for list of vectors), find:
(a) 3A-B
(b) 1) A?B 2) B?A
(c) 1) A*B 2) B*A
(d) (5A-6B+4C)?(B*C-A*B)

*(Please see attachment for complete question and equations)

##### Solution Summary

This shows how to perform operations on vectors.

##### Solution Preview

For the example
A · B = |A| |B| cos ( A - B) = 3 × 5 cos -20°, cos -20° is not equal to cos(20),
Then A · B=3*5*0.9397=14.1.

a. Given the following ...

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