8.1

Question 1

scalars

Answer 1

. Quantities that describe magnitude but do not include

direction

Question 2

Magnitude

Answer 2

magnitude is the size of a mathematical object

Question 3

Vectors

Answer 3

Quantities that describe magnitude and also include direction
are called

Question 4

Distance (d)

Answer 4

s a scalar quantity
that describes the length of a path between
two points or locations

Question 5

Position (d)

Answer 5

a
vector quantity that describes a specific point relative to a reference point.
In other words, position describes an object’s location as seen by an
observer from a particular viewpoint.

Question 6

time (t)

Answer 6

to describe

when an event occurs

Question 7

Time interval

Answer 7

difference between the initial time (when the

event begins) and the final time (when the event ends) is called the

Question 8

Displacement

Answer 8

the straight-line distance and direction from one
point to another. In other words, displacement describes how much an
object’s position has changed

Question 9

A motion

diagram

Answer 9

shows the object’s position at given
times and allows us to picture or visualize
motion.

Question 10

A best-fit line

Answer 10

a smooth curve or straight line that most closely fits the general shape
outlined by the points.

Question 11

speed

Answer 11

the distance an object travels during a

given time interval divided by the time interval. Speed is a scalar quantity.

Question 12

Velocity

Answer 12

the displacement of an
object during a time interval divided by the time interval. In other
words, velocity describes how fast an object’s position is changing

Question 13

Average velocity

Answer 13

the rate of change in position for a time interval.