# GCSE P2 Chapter 1

All aspects covered :)

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• Created by: emma998
• Created on: 26-02-14 17:13

## Distance-time graphs

• Distance-time graphs can be used to represent the motion of an object
• Y axis = distance (m)
• X axis = time (s)
• Speed(m/s) = Distance(m) / Time(s)
• Horizontal line = stationary
• Straight line sloping upwards = constant speed
• The steeper the line the faster the speed
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## Velocity and acceleration

• Velocity = speed in a given direction
• Change in speed or direction causes a change in velocity
• Acceleration = change in velocity
• Change in speed or direction causes acceleration
• Acceleration = (Final velocity(m) - Initial velocity(m)) / time(s)
• Negative acceleration = deceleration
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## Velocity-time graphs

• Velocity-time grpahs can be used to represent acceleration
• Y axis = Velocity (m)
• X axis = Time (s)
• Horizontal line = constant speed
• Straight line sloping upwards = accelration
• Straight line sloping downwards = decceleration
• The steeper the gradient the greater the acceleration
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## Using graphs

• Velocity-time graphs can also be used to work out the distance travelled
• The area underneath the line of the graph represents the distance travelled (m)
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