# The Physics of a Road Trip: Vocabulary

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The Physics of a Road Trip: Vocabulary

## 1. quantities

### 1.1. scalar quatntity

1.1.1. a physical measurement that can be described by magnitude only and has no direction

1.1.2. Distance

1.1.2.1. The length of a path between two points

### 1.2. vector quantity

1.2.1. A physical measurement that contains directional information

1.2.2. Displacement

1.2.2.1. Distance and direction of an object's change in position from the starting point.

## 2. time

### 2.2. Time Interval

2.2.1. the time between two events

2.3.1. ti=tf-ti

## 3. acceleration

### 3.2. constant acceleration

3.2.1. velocity changing at a constant rate

3.3.1. a=vf-vi/t

3.4.1. m/s^2

## 4. motion

### 4.1. speed

4.1.1. The distance an object travels per unit of time

### 4.2. velocity

4.2.1. the speed of an object in a particular direction

4.2.2. average velocity

4.2.2.1. the total displacement divided by the time interval during which the displacement occurred

4.2.3. Instantaneous velocity

4.2.3.1. the velocity of an object at some instant or at a specific point in the object's path

4.2.4. velocity formula

4.2.4.1. v=d/t

4.2.5. units for velocity

4.2.5.1. m/s

## 5. models

### 5.1. particle model

5.1.1. a simplified version of a motion diagram in which the moving object is replaced by a series of single points

### 5.2. distance-time graph

5.2.1. Line graph used to show the speed of a moving object

### 5.3. velocity-time graph

5.3.1. a graph that can be used to plot the velocity of an object versus time and to determine the sign of an object's acceleration

## 6. force

### 6.2. net force

6.2.1. The overall force on an object when all the individual forces acting on it are added together

6.3.1. F=ma

### 6.4. units for force

6.4.1. N (newtons)