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# SPEED AND VELOCITY

CONTENT

1. The Concepts of Distance, Speed, Velocity and Uniform Speed/Velocity
2. Calculations on Speed and Velocity
3. Distance-Time Graph, Displacement-time Graph

## The Concepts of Distance, Speed, Velocity and Uniform Speed/Velocity

### 1. Distance (s)

This is the separation or space between two points. It is measured in meters and it is a scalar quantity.

### 2. Displacement (s)

It is distance in a specified direction. It is a vector quantity and it is measured in meters.

### 3. Speed (v)

It is the rate of change of distance moved with time. The unit is m/ and it is a scalar quantity.

$$Speed = \frac{distance}{time} \\ v = \frac{s}{t}$$

#### (a) Uniform speed

It is obtained if the rate of change of distance with time is constant or when a body travels equal distances in equal time intervals.

#### (b) Average speed

Average speed is the total distance travelled divided by the total time taken.

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