# Speed, Velocity and Acceleration

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Acceleration
The rate of change in speed (or velocity) is measured in metres per second squared. Acceleration= change of velocity ÷ time taken
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Deceleration
Slowing down or negative acceleration, eg the car slowed down with a deceleration of 2ms-2
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Displacement
Quantity describing the distance from the start of the journey to the end in a straight line with a described direction, eg a hiker ended up at the hostel 50km due north of his original position
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Force
A push or pull. The unit of force is the Newton (N)
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Magnitude
The magnitude tells us the size of the vector
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Momentum
A quantity relating to a moving object that is calculated by multiplying its mass by its velocity
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Stationary
Not moving
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Velocity
The speed of an object in a particular direction
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## Other cards in this set

### Card 2

#### Front

Slowing down or negative acceleration, eg the car slowed down with a deceleration of 2ms-2

Deceleration

### Card 3

#### Front

Quantity describing the distance from the start of the journey to the end in a straight line with a described direction, eg a hiker ended up at the hostel 50km due north of his original position

### Card 4

#### Front

A push or pull. The unit of force is the Newton (N)

### Card 5

#### Front

The magnitude tells us the size of the vector