science P3

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  • Created by: emwatson
  • Created on: 15-11-15 14:36
How do you measure speed?
average speed=distance ÷ time
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What does the gradient tell us on a distance time graph ?
about the speed of the object. e.g a higher speed = steeper gradient
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what is a change of speed per unit called?
acceleration
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formula of measuring acceleration
acceleration= change in speed(or velocity) ÷ time taken
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why might reaction time increase ?
tired , under the influence of alcohol , travelling faster, distracted
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why might braking distance increase ?
road conditions poor, car hasn't been properly maintained e.g worn brakes , speed increased
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what is work done?
when a force moves an object in the direction in which the force acts.
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what is the formula for work done?
work done= force × distance moved ( in the direction of the force)
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name some safety features within a car.....
crumple zone, seat belts , air bags
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what is terminal speed?
maximum speed reached by a falling object. This happens when the forces acting on the object are balanced
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Other cards in this set

Card 2

Front

What does the gradient tell us on a distance time graph ?

Back

about the speed of the object. e.g a higher speed = steeper gradient

Card 3

Front

what is a change of speed per unit called?

Back

Preview of the front of card 3

Card 4

Front

formula of measuring acceleration

Back

Preview of the front of card 4

Card 5

Front

why might reaction time increase ?

Back

Preview of the front of card 5
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