Chapter 12.1 - 12.3

Question 1

What is the frame of reference?

Answer 1

It refers to something that is not moving with respect to an observer that can be used to detect motion.

Question 2

What is motion?

Answer 2

A change in position

Question 3

How is motion related to frame of reference?

Answer 3

Motion’s perception depends on a person’s frame of reference

Question 4

How do you measure distance?

Answer 4

Maps are often used to measure distance.

Question 5

How do you represent direction?

Answer 5

A vector can be used to measure direction?

Question 6

What is distance?

Answer 6

It is the length of the route between two points.

Question 7

What is the SI unit for distance?

Answer 7

Meter

Question 8

When would motion be a vector quantity?

Answer 8

When both distance and direction are considered.

Question 9

How are short distance measured?

Answer 9

In centimeters

Question 10

How are long distances measured?

Answer 10

In kilometers

Question 11

What is a vector?

Answer 11

It is a quantity that includes both size and direction

Question 12

How is a vector represented by?

Answer 12

It is represented by an arrow

Question 13

What does the length of the arrow represent?

Answer 13

Distance

Question 14

What does the way the arrow point represent?

Answer 14

Direction

Question 15

What is a scalar?

Answer 15

Magnitude

Question 16

What is magnitude and direction?

Answer 16

Vector

Question 17

What does delta mean?

Answer 17

Change in

Question 18

How do you calculate speed of a moving object?

Answer 18

Speed=distance/time

Question 19

What is speed?

Answer 19

It is an important aspect of motion and it is a measure of how fast or slow something moves

Question 20

What does speed depend on?

Answer 20

It depends on how far something travels and how long it takes to travel that far.

Question 21

What is the SI unit for speed?

Answer 21

Meters per second (m/s)

Question 22

What is instantaneous speed?

Answer 22

It is the speed of a moving object at a given instant

Question 23

What is easier to calculate speed than instantaneous speed?

Answer 23

Average speed

Question 24

What is average speed?

Answer 24

It is the total distance traveled divided by the total time it took to travel that distance

Question 25

How do you calculate average speed?

Answer 25

△d d⒡ - d⒤ ⎯⎯⎯⎯⎯⎯ = ⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯ △t t⒡ - t⒤ change in distance over change in time

Question 26

What does the distance-time graph represent?

Answer 26

Motion of an object

Question 27

What is the speed of an object represented by on a distance-time graph?

Answer 27

It is represented by the slope or steepness of the graph line

Question 28

What is velocity?

Answer 28

It is the measure of both speed and direction

Question 29

How is velocity different from speed?

Answer 29

Speed only tells us how fast or slow an object is moving, but velocity tells us both the measure of speed and direction.

Question 30

Velocity is also what?

Answer 30

Velocity is also a vector.

Question 31

What can velocity (that is a vector) be represented with?

Answer 31

An arrow

Question 32

How do you calculate the average velocity?

Answer 32

displacement d⒡ - d⒤ ⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯ = ⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯ time time

Question 33

What is acceleration?

Answer 33

It is the measure of the change in velocity of a moving object

Question 34

What does acceleration show?

Answer 34

It shows how quickly velocity changes

Question 35

Why acceleration a vector?

Answer 35

It includes both size (speed) and direction

Question 36

What can acceleration reflect a change in?

Answer 36

It may reflect a change on speed, direction, or even both

Question 37

What is negative acceleration?

Answer 37

Deceleration

Question 38

A change in direction without a change in speed is...?

Answer 38

Acceleration

Question 39

When is calculating acceleration complicated?

Answer 39

When both speed and direction are changing

Question 40

When is it easier to calculate acceleration?

Answer 40

When only speed is changing

Question 41

How can you calculate acceleration without a change in direction?

Answer 41

You just divide the change in velocity by the change in time

Question 42

What is the formula for calculating acceleration?

Answer 42

△v v⒡ - v⒤ ⎯⎯⎯⎯⎯⎯ = ⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯ △t time

Question 43

What is a velocity-time graph?

Answer 43

It represents the acceleration of an object

Question 44

What does a velocity-time graph show?

Answer 44

It shows how velocity changes over time

Question 45

What is the difference between a velocity-time graph and a distance-time graph?

Answer 45

It is basically the same except for the y-axis (It shows velocity instead of distance

Question 46

In a velocity-time graph how or where is acceleration shown?

Answer 46

It is shown by the slope of the graph line