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 .