AQA Physics Unit 2

This is all thanks to Rosanna Weatherly because she's the one who uploaded them. But since they were in OneNote, I decided to make a Microsoft version accessible to more people. I've changes the boxes and layout into bullet points etc. 

I noticed a few minor mistakes that I have corrected and tried to use more accurate terminology in some parts but overall, it was brilliant! Great revision source and very concise and just great! If there are any more mistakes, please let me know. Otherwise, enjoy! 

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  • Created by: Aparna
  • Created on: 29-05-12 21:17
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Physics Unit 2
Distance - Time Graphs
Gradient = speed
The steeper the line, the faster it's going
Flat sections = stopped
Downhill = towards start point
Curves = Acceleration/deceleration
Steepening = Speeding up
Levelling off = Slowing down.

Speed, acceleration and velocity
Speed and velocity are measured in m/s…

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Weight is caused by the pull of gravity. Weight is measured in Newtons. (N). It's a force.
Weight = mass (kg) x gravitational field strength (N)
An object has the same mass wherever it is, but a different weight depending on the gravity.

The 3 Laws of Motion
1. BALANCED…

Page 3

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Terminal Velocity
When cars/freefalling objects set off, they have more accelerating force than resistance.
As the speed increases, the resistance builds up. This gradually reduces the acceleration until
the resistance = accelerating force, forces are balances, which is terminal velocity.
The resultant force = 0.
An object's terminal velocity depends…

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It has a frequency of 50Hz
On a CRO tracer the VERTICAL height of the trace shows input voltage
To calculate the FREQUENCY (Hz) you do 1/Time (s)

A Plug
Neutral Wire = Blue.
Live Wire = Brown
Earth Wire = Green and Yellow.

Static Electricity
A build up of…

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Voltage is the same everywhere. V1 = V2 = V3
Current is shared between branches. Total current = Total of all the currents of separate
branches. A1 + A2 + A3 = A.
Total resistance = less than the branch with the smallest resistance.
1/R1 + 1/R2 +1/ R3 +…

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Releases a lot of heat. It gives more energy than chemical bonds do.
Happens in reaction chambers.
Usually Uranium 235 or Plutonium 239 are used.
There is a chain reaction, where neutrons are absorbed by large nuclei which cause it to split
to produce daughter nuclei, and more neutrons that…

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