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Physics

Distance, speed and acceleration flashcards

QuestionAnswer
What is the equation for speed? speed = distance/time
What is displacement? the distance moved in a straight line in a given direction from the starting point?
What does the gradient tell us on a distance-time graph? how fast the object is travelling
What the gradient of the line if an object is stopped/stationary on a distant-time graph? flat line going across the graph
What's the unit to measure speed? m/s
what's the equation for working out acceleration? change in velocity/time
What's the unit for acceleration? m/s^2 (squared)
What do velocity-time graphs show? the acceleration of an object
How is deceleration shown on a velocity-time graph? the line will be be going downwards, the steeper the line the faster the deceleration
How is constant speed shown on a velocity-time graph? straight lien across the graph
What is braking distance? The distance travelled by a vehicle whilst it is braking?
What can affect a vehicles braking distance? . worn tyres . worn brakes (discs/pads) . Road conditions (ice, standing water)
What is stopping distance? the overall distance travelled by the vehicle whilst stopping (the thinking and braking distances put together)
What happens to the overall stopping distance when the speed limit increases? It increases
what are some causes that can affect thinking distances? . tiredness . under influence of alcohol . mobile phones . drugs
Created by: willum
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