A complete summarised group of documents complete for GCSE Physics AQA 9-1. To make these Summaries I used 3 sources: The CGP revision guide, My GCSE Science Videos and Free science lessons videos. I achieved an 8 in GCSE AQA Triple Physics.
Energy P1
Energy Stores
WHERE ENERGY IS STORED IN AN OBJECT
Thermal
Kinetic
Gravitational Potential
Elastic Potential
Systems
Fancy word for single object/group of objects
When a system changes, energy is transferred
Energy can be transferred into or away from systems, between objects or between different energy
stores
CLOSED SYSTEMS- systems where MATTER OR ENERGY CAN’T ENTER OR LEAVE
1. Net change is always 0 in closed system
Energy Transfer by heating
Boiling water example
1. Water is the system
2. Energy is transferred to the water by heating
3. Energy is transferred to the thermal energy store causing the temperature to rise
Kettle’s heating element and the water as a two-object system
1. Energy is transferred from the electric store of the kettle
2. Energy arrives at the thermal energy store of the kettle, heating the water up
3. Energy is transferred from the kettle’s energy store to the water’s energy store
Energy transfer by DOING WORKKKk
WORK DONE IS THE SAME AS ENERGY TRANSFER
Can be done when current flows against resistance in a circuit
Can be done when a force moves on an object
Examples of Work done
Throwing a ball upwards
1. Initial force exerted by the person’s arm does work
2. Energy from the chemical energy store in the person’s arm gets transferred
3. Energy goes into the arm’s kinetic energy store
4. From the arm energy is transferred into the ball
Ball dropping from a height
1. A ball dropped from a height is accelerated by gravity
2. The gravitational force does work (transfers energy)
3. The energy from the GPE store goes into the kinetic energy store
Collision between car and STATIONARY OBJECT
1. The normal contact force does work (transfers energy)
2. Kinetic energy transferred from car to elastic potential/thermal stores or transferred into
sound waves
Kinetic and Potential Energy Stores
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