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Flashcards in Chapter 9 Deck (30):
1

Motion

When distance from another object is changing

2

Reference point

A place or object used for comparison to determine if something is in motion

3

Relative motion

Whether or not an object is in motion depends on the reference point

4

International system of units

System of measurement scientists use

5

Speed

The distance an object travels per unit of time

6

Formula for speed

Speed= distance/time

7

Formula for Average speed

The total distance divided by total time

8

Instantaneous speed

The rate at which an object is moving at a given instant in time

9

Velocity

Speed in a given direction

10

Slope

Steepness of a line on a graph

11

Formula for calculating slope

Slope= rise\ run
OR
Y2- Y1/x1-x2

12

An object is in___ when its distance from another object is changing

Motion

13

An object is in motion if it changes position relative to a ___.

Reference point

14

What is the basic unit of length in SI?

Meter

15

How many centimeters are in a meter?

100

16

How many meters are in a kilometer?

1000

17

If given a speed of an object, what do you need to know to determine its velocity?

Direction of motion

18

Acceleration

The rate at which velocity changes

19

What does acceleration refer to?

Increasing speed, decreasing speed, and change in direction

20

What is the formula for acceleration?

Final speed -initial speed over time

21

What can you use a speed vs. time graph and a distance vs. time graph for?

To analyze the motion of an accelerating object

22

For a speed vs. time graph, what does it mean if the line is going upward?

That the speed is increasing

23

What does it mean if the line is straight for a speed vs. time graph?

That the acceleration is constant

24

For a distance vs. time graph, what does a curved line mean?

That the object is accelerating

25

What does it mean if the line is straight for a distance vs. time graph?

That the object is not moving

26

How many centimeters are in a meter?

100

27

How many meters are in a kilometer?

1,000

28

How many millimeters are in a meter?

1,000

29

How many millimeters are in a centimeter?

10

30

How many kilometers are in a meter?

.001