P3 Additional Science

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  • Created by: SumSum.xo
  • Created on: 25-04-16 20:01
What is the equation for Distance?
speed x time or average speed x time
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On a distance time graph what does the gradient represent?
speed
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What is the equation for acceleration?
change in speed divided by time taken
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On a sped-time graph the gradient equals...
the acceleration
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name all 6 forces
gravity (weight), reaction force, thrust, drag, lift and finally tension
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when forces are unbalanced the object...
accelerates
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what is the equation for force?
mass x acceleration
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when the forces of an object are balanced it has reached it's...
terminal velocity
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what does a crumple zone do to decrease the impact of a car crash?
the crumple zones crumple and change the shape of the car. This increases the time it takes for the car to stop, therefore reducing the impact
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what is the equation for work done?
work done= force x distance
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name three safety features of a car
seat belts, crumple zones and air bags
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how do seatbelt work?
they stretch slightly which increases the time it takes for the driver/ seat belt wearer to stop. This reduces the impact on the chest, reducing the chances of injury
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what is momentum?
the greater the mass of an object the greater it's velocity, which means it has a larger momentum. the equation is: momentum (kg m/s)= mass (kg) x velocity (m/s)
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what causes a change in momentum?
The force that is acting on an object
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what is thinking distance?
The distance the car travels between the driver seeing the hazard and placing their foot on the brakes
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how is the thinking distance affected?
1. How fast you are traveling 2. Tiredness, drugs, alcohol, distractions and a lack of concentration
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What is braking distance?
the distance the car travels after the brakes have been applied to the car actually stopping
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what affects the braking distance?
1. Speed 2. The mass of the car 3. How good your brakes are.. are they worn down? 4. The grip of the surface e.g. icy roads
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Other cards in this set

Card 2

Front

On a distance time graph what does the gradient represent?

Back

speed

Card 3

Front

What is the equation for acceleration?

Back

Preview of the front of card 3

Card 4

Front

On a sped-time graph the gradient equals...

Back

Preview of the front of card 4

Card 5

Front

name all 6 forces

Back

Preview of the front of card 5
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