## 1. NewTons Law of Motions

### 1.1. An object at rest remains at rest, and an object in motion remains in motion at constant speed and in a straight line unless acted on by an unbalanced force.

### 1.2. The acceleration of an object depends on the mass of the object and the amount of force applied.

### 1.3. Whenever one object exerts a force on another object, the second object exerts an equal and opposite on the first.

## 2. Equations of Motion

### 2.1. Uniformly Accelerated Bodies in a Straight Line:

2.1.1. Vf= Vi+at

2.1.1.1. S= Vit+ 1/2 (at^2)

2.1.1.1.1. 2aS= Vi^2 - Vf^2

### 2.2. Uniform Gravitational Field in a Non-Resistive Medium

2.2.1. Vf= Vi+gt

2.2.1.1. S=Vit+1/2(gt^2)

2.2.1.1.1. 2gS= Vf^2 - Vi^2

## 3. Displacement

### 3.1. A change in the position of body from its initial position to its final position.

## 4. Velocity

### 4.1. Definition

4.1.1. The Velocity of an object is defined as the displacement covered per unit time

### 4.2. Average Velocity

4.2.1. The change in an object's position in a given direction divided by the time it took to move from the initial to the final position.

### 4.3. Instantaneous Velocity

4.3.1. The instantaneous velocity, also known as simple velocity, tells us how fast an object is moving anywhere along its path.

## 5. Acceleration

### 5.1. Definition

5.1.1. Rate at which velocity changes with time, in terms of both speed and direction.

### 5.2. Average Acceleration

5.2.1. The change in velocity divided by the elapsed time

### 5.3. Instantaneous Acceleration

5.3.1. The ratio of velocity change over a given time interval until the time interval reaches zero.