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