# GCSE Physics - P3: Forces and Motion

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- Created by: Heffernan99
- Created on: 29-02-16 22:44

Speed

Distance moved / time taken. How fast something is moving

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*Average Speed*

Total distance traveled / the time taken

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Speed Camera

Camera used to find the speed of a vehicle

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Distance-time Graphs

Graph showing the distance on the y-axis and time on the x-axis. It shows the distance traveled from a certain point at a particular moment

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Gradient

Slope of a graph

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Stationary

Not moving, at rest

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Positive Gradient

Line on a graph whose y-value increases as the x-value increases

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Negative Gradient

Line on a graph whose y-value decreases as the x-value increases

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Acceleration

Speeding up, slowing down or changing direction. Change in velocity per second measured in m/s squared

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Deceleration

An acceleration which involves the slowing down of an object

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Velocity

How fast something is moving in a certain direction

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Relative Velocity

How fast one object is moving as measured from another object

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Speed-Time Graph

Graph with speed on the y-axis and time on the x-axis. It shows the speed of an object at a particular moment

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Mass

Amount of matter in a object. It is measured in kilograms

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*Resultant Force*

Single force that would have the same overall effect of all the forces combined

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Breaking Distance

Distance moved by a vehicle when it slows down and stops after the breaks have been applied

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Reaction Time

Time taken from seeing a hazard to starting to press the break peadle

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Thinking Distance

Distance traveled by a vehicle in the reaction time

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Stopping Distance

Sum of the thinking distance and breaking distance

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Work Done

Energy transferred, measured in joules. Work is done whenever a force moves a distance. Work done = force applied x distance moved in the direction of the force

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Joule

Unit of energy or work done

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Power

Work done (or energy transferred) in a given time. Measured in watts

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Watt

Unit of power

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Kinetic Energy

Energy any object has when it is moving

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Fossil Fuel

Fuel that was formed by the decay of the remains of creatures that lived millions of years ago. Coal, oil, and natural gas are all fossil fuels.

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Biofuel

Liquid fuel similar to diesel, made from plants

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Fuel Consumption

Measure of the efficiency of an engine that burns fuel. A more efficient vehicle has lower fuel consumption and so travels a greater distance using the same amount of fuel

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Momentum

Mass of an object x velocity

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ABS Breaks

Means of stopping a car without skidding by rapidly turning the breaks on and off

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Traction Control

Means of preventing cars skidding by trolling the power delivered to each wheel

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Paddle Controls

Set of leavers and buttons that allow the driver of a car to turn devices on and off without taking hands off the wheel

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Weigth

Force on an object due to the force of gravity on a planet

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Acceleration Due to Gravity

Rate of change of velocity due to the force of gravity

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Fluid

A liquid or a gas

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Terminal Speed

Maximum speed of an object when the forces on it are balanced. Usally applied to objects falling under gravity

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Gravitational Potential Energy

Energy an object has when it is above the ground

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## Other cards in this set

### Card 2

#### Front

Total distance traveled / the time taken

#### Back

*Average Speed*

### Card 3

#### Front

Camera used to find the speed of a vehicle

#### Back

### Card 4

#### Front

Graph showing the distance on the y-axis and time on the x-axis. It shows the distance traveled from a certain point at a particular moment

#### Back

### Card 5

#### Front

Slope of a graph

#### Back

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