P3

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What is the equation for working out distance?
distance = speed x time
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What does the gradient represent on a distance-time graph?
Speed
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What is acceleration? and how do you work it out?
How quicky the speed is changing. Acceleration = change in speed / time taken
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The flat sections on a speed-time graph represent a constant speed, but what does the gradient represent?
Acceleration
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Mass is the amount of 'stuff' in an object and is measured in kg. But what is weight and what are the units?
Weight is a force caused by the pull of gravity. It is measured in newtons (N).
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How is terminal velocity reached?
When the forces acting on an object are balanced.
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What does unbalanced forces cause?
Acceleration
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Stopping distance is both thinking and braking distance added together. What affects a thinking distance?
Being drunk, being tired, being under the influence of drugs.
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If your speed doubles, what happens to your stopping distance?
The stopping distance will multiply by 4.
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The greater the mass of an object and the greater its velocity, does it have more or less momentum?
More.
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What are the units for momentum?
kgm/s
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Give 4 examples of car safety features.
Crumple Zones, Seat Belts, Air Bags and ABS Brakes
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What is work done and how do you work it out?
When a force makes an object move, energy is tranferred and work is done. Work Done = force x distsance
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How is GPE worked out? and what is the gravitational field strength?
GPE = mass x g x height. 10N/kg
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What is kinetic energy?
The energy when something is moving
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When an object falls what is the energy transferred?
Gravitational Potential Energy to Kinetic Energy
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How do you work out power?
Power = work done / time taken OR Power = force x speed
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Give three factors that affect the fuel consumption of a car
Size, Design and Distance travelled.
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Give four different types of fuels.
Fossil fuels, biofuels, electric, solar
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Give one disadvantage of fossil fuels.
They produce carbon dioxide which increases greenhouse gases and climate change.
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Other cards in this set

Card 2

Front

What does the gradient represent on a distance-time graph?

Back

Speed

Card 3

Front

What is acceleration? and how do you work it out?

Back

Preview of the front of card 3

Card 4

Front

The flat sections on a speed-time graph represent a constant speed, but what does the gradient represent?

Back

Preview of the front of card 4

Card 5

Front

Mass is the amount of 'stuff' in an object and is measured in kg. But what is weight and what are the units?

Back

Preview of the front of card 5
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