AQA double science additional physics notes.

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Distance-Time Graphs, Velocity and Acceleration.

The steeper the line on a distance-time graph, the greater the speed it represents.

Distance is on the y axis and time taken is on the x axis.

Speed is distance ÷ time. The unit is (m/s).

If you calculate the slope of the line, you will know the speed of the object.

Velocity is speed with direction.

Acceleration is change in velocity ÷ time taken for the change.

The unit for acceleration is (m/s/s).

If a body changes direction it changes velocity, so it accelerates, even if the speed stays the same.

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Velocity-Time graphs

Velocity is on the y axistime is on the x axis.

The slope of a line on the graph represents acceleration.

The steeper the slope, the greater the acceleration.

If the slope is negative, the body is decelerating.

The area under the line on the graph is the  distance travelled in a given time.

The bigger the area, the greater the distance travelled.

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