How far an objects travelled from its starting point in a given direction
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Define acceleration
The rate of change of an objects velocity
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Define speed
How fast something is moving, regardless of direction
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What is the only force present in free fall motion?
Weight
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What is usually taken to be the value of g?
9.81
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Can objects in free fall also have an initial velocity?
Yes as long as the force providing free fall is no longer acting
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What is free fall called when an object is given an initial velocity?
Projectile motion
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When using the SUVAT equations during projectile motion what should you do?
Split all the quantities in to horizontal and vertical components and solve horizontally and vertically
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What kind of motion does a curved displacement-time graph show?
Acceleration
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What kind of motion does a straight line displacement-time graph show?
Constant acceleration
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What doe the rate of change of gradient on a displacement-time graph show?
Acceleration
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What can be calculated using a tangent to the curve of a distance-time graph?
Instant velocity
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What is the difference between instantaneous velocity and average velocity?
Average velocity is the total change in displacement of the object divided by the total time taken, instantaneous velocity is value of velocity at a given time
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What is given by the gradient of a velocity-time graph?
Acceleration
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How is uniform acceleration shown on a velocity-time graph?
Straight line graph
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What does the area under a velocity-time graph show you?
Displacement
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What does a curved velocity-time graph show?
Non-uniform acceleration
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What is one advantage of using a light gate instead of a stop watch?
They have a much lower uncertainty that other methods , eg, stopwatches. This is because the system does not rely on human reaction times and judgement
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What is a time ticker?
Equipment used to measure speed. Length of paper is fed through the ticker and attached to the object, they create dots on the paper at consecutive intervals which can be used to calculate speed and acceleration
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Define Stopping distance
Distance covered in the timer between spotting a hazard and the vehicle coming to a complete stop
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Stopping distance=
Thinking distance+Braking distance
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Define thinking distance
The distance the vehicle travels during reaction time
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Define Braking distance
The distance a vehicle travels after the brakes are applied until it comes to a complete stop
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