AQA Additional Science (Physics) revision

Revision notes on the first section of Additional Physics. All about work, power, distance-time graphs etc... 

With help from GCSE Physics -The Revision Guide by CGP and my-gcsescience.com 

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  • Created by: Sophie
  • Created on: 23-05-13 15:06
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AQA ADDITIONAL PHYSICS 1
Velocity and Distance Time Graphs
SPEED and VELOCITY are both HOW FAST you are going.
Speed is just how fast
Whereas velocity must have a direction
1. Gradient = speed
2. Flat sections are where it's stationary
3. Straight uphill or downhill sections mean
it's travelling at a steady speed
4. The steeper the graph the faster it's
going.
5. Downhill sections mean it's going back
towards its starting point
6. Curves represent acceleration or
deceleration
7. A steepening curve means it's speeding
up
8. A levelling off curve means it's slowing down
Speed in m/s =distance travelled in metres, m
time taken in seconds, s

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Page 2

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AQA ADDITIONAL PHYSICS 2
Acceleration and Velocity-Time Graphs
ACCELERATION is HOW QUICKLY velocity is CHANGING
A change in velocity can be a ­CHANGE IN SPEED
- CHANGE IN DIRECTION
change in velocity
Acceleration, m/s2 = time taken, s
VELOCITY ­ TIME GRAPHS
1. GRADIENT=ACCELERATION
2. Flat sections represent steady speed
3. The steeper the graph, the greater the acceleration or
deceleration
4. Uphill sections (/) are acceleration
5. Downhill sections (\) are deceleration
6.…read more

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AQA ADDITIONAL PHYSICS 3
Weight, Mass and Gravity
GRAVITATIONAL FORCE is the FORCE OF ATTRACTION
between ALL MASSES
Gravity attracts all masses
1. On the surface of a planet, it makes all things accelerate
towards the ground
2. It gives everything a weight
WEIGHT and MASS are NOT THE SAME
1. Mass is just the amount of `stuff' in an object
2. Weight is caused by the pull of gravitational force.…read more

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AQA ADDITIONAL PHYSICS 4
Resultant Forces
RESULATANT FORCE is the OVERALL FORCE on a point or object
1. In most situations there are at least two forces acting on an
object along a direction
2. The overall effect of these forces will decide the motion of
the object
3. If you have a number of forces acting at a single point, you
can replace them with a single force
4.…read more

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AQA ADDITIONAL PHYSICS 5
Terminal Velocity
An object acted on only by gravity accelerates at about 10m/ s2
If the object falls with no other forces acting on it the resultant force is its
weight. Example: If we release a 1kg object above the ground:
The force of gravity is 10N
force
Its acceleration ( mass = 10 N
1kg ) = 10m/ s
2
If the object falls in a fluid, the fluid drags on the object. The drag force
increases with speed.…read more

Page 6

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AQA ADDITIONAL PHYSICS 6
Calculating Work and Power
WORK MEANS ENERGY TRANSFERRED (Joules)
W ork = f orce × distance
W = f ×d
200N × 1.…read more

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AQA ADDITIONAL PHYSICS 7
v-u f , N
a, m/s2 = t, s a= m, kg
EXAMPLE:
An engine of a car is 2500N. Calculate the acceleration. Mass of the car is 500
kg.
a=
f , N
m, kg a = 2500 2
500 = 5 m/s
A cheetah accelerates from 10m/s to 25m/s in 3 seconds.…read more

Comments

lisa linsdell

Revision notes for the first section of Additional physics AQA exam board. Contains graphs, formula, information on dstance-time, etc.

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