3.1 Introduction to Vectors

(T) or (F) : A resultant is a vector that represents the sum or two vectors only .

False; It can represent the sum of two or more vectors .

(T) or (F) : Vectors can be moved perpendicular to themselves in a diagram .

False; they can be moved parallel to themselves in a diagram .

(T) or (F) : Vector quantities will be in an italicized font .

False; they will be in bold faced symbols.

What is a scalar?

It is a physical quantity that has a magnitude but no direction.

What is a vector?

It is a physical quantity that has both a magnitude and direction .

Vectors indicate both direction and magnitude , while scalars indicate __________________ only .

Magnitude

Vector with the same magnitude as the original but opposite in direction is a(n) _______________________ .

Negative vector .

The direction of the resultant vector can be determined by using a(n) ___________________ to measure the angles .

Protractor

The magnitude of the resultant vector can be determined by using a(n) __________________ .

Ruler

(Vector) or (Scalar) : 25 degrees celsius .

Scalar .

(Vector) or (Scalar) : The number of passengers on a plane .

Scalar .

What does the arrows on the soccer players represent ?

The arrows represent the velocities (magnitudes) of the two soccer players toward the soccer ball.

Which physical quantity is resulted during the multiplication or division of a vector by a scalar ?

The physical quantity resulted is the vector .

(T) or (F) : Vector quantities can be interpreted graphically .

True .

(T) or (F) : To subtract a vector quantity , you should add its opposite .

True.

(T) or (F) : Vectors can be added in any non-certain order .

True.

(Vector) or (Scalar) : 30 m/sec , to the east .

Vector .

(Vector) or (Scalar) : The acceleration of a plane as it takes off .

Vector .