Minor Physics - Internal vector CO1

What is a vector?

• A scalar quantity

• A directed quantity

• A physical law

• A mathematical formula

How do you find the x-component of a vector?

• Multiply by cosine of angle

• Multiply by sine of angle

• Divide by magnitude

• Add to y-component

What is a unit vector?

• A vector with magnitude 1

• A vector with magnitude 0

• A scalar quantity

• A physical law

What is the dot product of two vectors?

• A scalar quantity

• A vector quantity

• A physical law

• A mathematical formula

How do you find the direction of cross product of two vectors?

• Multiply corresponding components

• Add corresponding components

• Divide corresponding components

• Use right-hand rule

What's the difference between orthogonal and parallel vectors?

• Orthogonal vectors are parallel

• Parallel vectors are orthogonal

• Orthogonal vectors have zero dot product

• Parallel vectors have non-zero dot product

Vector C = 2i + 3j, find the unit vector in the direction of vector C.

• (2/√13)i + (3/√13)j

• (2/13)i + (3/13)j

• (2/√13)i - (3/√13)j

• (2/13)i - (3/13)j

Vector A = 2i+ 2j and vector B = -2i + 2j, find the angle between vector A and vector B.

• 0.89°

• 1.00°

• 0.61°

• 90°

If vector A = 2i + 3j + 4k and vector B = 4i - 2j + 3k, what is the cross product of vector A and

vector B?

A) 6i + 16j - 10k

B) 10i - 6j + 16k

C) 16i + 10j - 6k

D) -10i + 6j + 16k

• 17i + 10j - 16k

• 10i - 6j + 16k

• 16i + 10j - 6k

• -10i + 6j + 16k

What's i x i ?

• 0

• 1

• 2

• None of the above