# Motion

• Created by: mccali13
• Created on: 22-09-18 11:58
Define: Distance
Distance is a scalar measure of the interval between two locations measured along the actual path connecting them
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Define: Average speed
The rate of change in distance calculated over a complete jorney
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Define: Instaneous speed
The speed at the moment it is measured; speed over an infinitesmal interval of time
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Define: Displacement
Displacement is a vector measure of the interval between two locations measured along the shortest path connecting them.
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Define: Average Velocity
The change in displacement for a journey divided by the time taken
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Explain the gradient of a distance time-graph
The gradient is equal to the distance travelled divided by the time taken
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Define: Acceleration
Acceleration is a vector quantity that is defined as the rate at which an object changes its velocity. An object is accelerating if it is changing its velocity.
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Explain the gradient of a velocity-time graph
The gradient can determine the acceleration of an object
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Explain the area under a velocity-time graph
Displacement can be read from the area under the graph
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Thinking distance
Distance travelled batween the moment a driver has reason to stop to the moment they hit the brakes
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Braking distance
distance travelled from the time the brakes are applied until the vehicle stops
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Stopping distance
Total distance travelled from when the driver sees a reason to stop, to when the vehicle stops. Braking distance plus stopping distance.
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## Other cards in this set

### Card 2

#### Front

The rate of change in distance calculated over a complete jorney

#### Back

Define: Average speed

### Card 3

#### Front

The speed at the moment it is measured; speed over an infinitesmal interval of time

### Card 4

#### Front

Displacement is a vector measure of the interval between two locations measured along the shortest path connecting them.

### Card 5

#### Front

The change in displacement for a journey divided by the time taken