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Unit 1: Motion
Unit 2: Speeding Up and Slowing Down
Unit 3: Work and Energy
Unit 4: Static Electricity
Unit 5: Current Electricity
Unit 6: Mains Electricity
Unit 7: Nuclear Physics

[This is Unit 2 Physics, Additional Physics. This section comes after Core Physics in an AQA Course

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This formula can be rearranged to show either of the following formulae which we use to work out
distance or time:

Generally, speed is measured in metres per second (m/s).

Velocity is speed in a given direction. This means that if a moving object changes direction, its
velocity changes even…

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P2-2 : Speeding Up and Slowing Down
Equal and Opposite Forces
We measure forces in newtons, N. Objects always exert equal and opposite forces on each other.
For example, if object A exerted a force upon object B, object B would exert an opposite force of the
same power on…

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If the object is on the Earth, not falling, we use:

weight (N) = mass (kg) x gravitational field strength (N/kg)

When an object falls through a fluid (i.e. a liquid or a gas, e.g. air), the fluid exerts opposite forces on
the falling object reducing its motion, for example…

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firing a gun: as you fire, the bullet moves out with a momentum in one direction, and the gun recoils
in the opposite direction with equal movement.

When a force acts on a moving object (or an object which is able to move), its momentum changes.
The equation below describes…

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The bigger the charge on an isolated object, the higher the potential difference between the object
and the earth. If the potential difference becomes high enough, a spark may jump across the gap
between the object and any earthed conductor brought near it [a metal object is earthed by

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The symbols shown relate to their descriptions below. We use these symbols to make circuit
diagrams to show how components are connected to make a circuit.

A cell is necessary to push electrons around a completed circuit
A battery consists of two or more cells joined together, increasing the "power…

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The current through a diode can only flow in one direction ­ in the reverse direction, the resistance
is so high that the current is zero.

The resistance on an LDR (light-dependent resistor) decreases as the light falling on it gets brighter.

As the temperature of a thermistor, however, goes…

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Series circuit: the current of the bulbs will have the exact same
current flowing through them, e.g. 8 amps. If they all have the same
resistance, they will all share the same potential difference (e.g. all
at 6V) ­ but if one bulb had a significantly higher resistance than the…

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Appliances with a metal exterior must be earthed, appliances with plastic cases do not ­ they are
said to be "double insulated" and are connected to the mains supply using only a neutral wire and a
live wire.

There are also fuses fitted to the plugs. If a fault develops…



Glad I could help! :)

lisa linsdell

Comprehensive notes for this AQA unit. Covers the whole of the unit.

Talia Lowton

thank you Lisa! Just downloaded these (biology, chemistry and physics) all ready for my holidays so I dont have to take so much with me, I love the layout, it's very easy to read and understand :)


Thanks a lot. xD

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