Self-Assessment Solutions

Vector Versus Scalar

1.	A scalar is just a plain old number, or a magnitude only. A vector has both magnitude and direction.
2.	Vector
3.	Scalar
4.	+60 feet
5.	–60 feet
6.	+130 pixels
7.	470 pixels
8.	0

Polar Coordinates Versus Components

1.
2.	B = 13 units @ 22.6°
3.
4.	D = 10 units @ 36.9°

Vector Addition and Subtraction

1.
2.	B = 10 units @ 53.1°
3.
4.
5.
6.
7.

Scalar Multiplication

1.	Magnitude only
2.	(–1/3)A = –4m/s @ 43°
3.
4.
5.

Dot Product

1.	0
2.	7
3.	Yes
4.	74.81°
5.	No

Cross Product

1.	[–12 –13 –3]
2.
3.	44.9°