Vectors

The cross product of vectors A and B is

• parallel to either A or B

• parallel to both A and B

• perpendicular to either A or B

• perpendicular to both A and B

If the dot product of two vectors is equal to zero, then what do we know about the two vectors?

• They are parallel.

• They are perpendicular.

• They are unit vectors.

• They are both zero vectors.

How do you know that two vectors are parallel?

• Their sum is 0.

• Their scalar product is 0.

• Their vector product is 0.

The vector equation of the line through the points A(-1, 2, 3) and B(2, 1, 4) is

• 0

• 1

• -1

• 4

The magnitude of the vector 2i −3j+ 4k is:

• 3