21st Century Science P4 revision
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| Speed is .... | The distance travelled in a certain time.
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| The formula for speed is | Distance / Time
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| the axis in a distance speed graph are... | Time on the x axis and Distance up the y axis.
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| Speed can be calculated by | calculating the gradient of the graph horitontal / vertical
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| In a distance speed graph the flat sections are .... | where the object is stopped
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| In a distance time graph the steeper the slope... | the faster the object is going
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| In a distance time graph the downhill section means.. | the objct is coming back towards you.
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| When talking about distance time graphs distances can be.... | positive or negative.
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| Speed is just a number but.. | velocity has direction too
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| in a velocity time graph gradient represents.... | acceleration
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| in a velocity time graph flat sections represent... | constant speed
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| in a velocity time graph the steeper the slope... | The greater the acceleration
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| In a velocity time graph uphill sections indicate... | acceleration
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| in a velocity time graph downhill sections indicate.. | deceleration
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| in a velocity time graph the area under the graph is equal to... | the distance travelled in that time interval.
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| Forces occur when...... | two objects interact
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| If you push against a wall, the wall... | pushes back
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| Moving objects normally.... | experience Friction
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| Resultant force is... | the overall force acting on an object.
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| The formula for Momentum is | mass x velocity
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| The formula for change of momentum is.. | Resultant force x time for which the force acts
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| change in energy is the same as.. | Work done
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| The formula for work done is | Force x Distance
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| The formula for kinetic energy is | half x mass x velocity squared
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| The formula for change in gravitational potential energy is | Weight x change in height
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| Falling objects convert gravitational potential energy into | Kinetic energy
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