# 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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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?

Speed

### Card 3

#### Front

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

### Card 4

#### Front

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

### 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?