General Physics
- Created by: abichicken
- Created on: 25-03-14 16:49
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- General Physics
- Speed and Acceleration
- SPEED = DISTANCE / TIME
- ACCELERATION = CHANGE IN VOLOCITY / TIME
- Speed, distance and time graphs
- Density
- DENSITY= MASS / VOLUME
- Mass and weight
- WEIGHT = MASS X GRAVITY
- Forces
- MOMENT OF A FORCE ON A PIVOT = FORCE X PERPENDICULAR DISTANCE FROM PIVOT
- Hooks Law
- When an elastic object - such as a spring - is stretched, the increased length is called its extension. The extension of an elastic object is directly proportional to the force applied to it:
- FORCE = MASS X ACCELERATION
- Energy
- Transfer
- Energy is converted from one type to another
- General
- Measured in Joules
- Energy can only be transformed from one type to another never made
- Types of energy
- Chemical
- Electric
- Elastic/ strain
- Kinetic
- KE=MASS X (VOLOITY)2
- Gravitational Potential
- GPE= MASS X GRAVITY X HEIGHT
- GPE= WEIGHT X HEIGHT
- GPE= MASS X GRAVITY X HEIGHT
- Heat
- Sound
- Light
- Nuclear
- Sources
- Hydroelectric
- Renewable
- Power stations near lakes, reservoirs'
- No CO2 emitted
- Nuclear
- Non-renewable
- Nuclear fission- no CO2 produced
- More energy produced than fossil fuels
- Nuclear waste-Toxic and harmfull
- Neutron hits the nucleus and as the nucleus splitting releases mainly heat energy and as the neutron splits it can travel to hit more nucleus' to create more energy
- Wind energy
- Renewable
- No CO2
- Gas
- Non-renewable
- 370kg/mwh CO2
- Hydroelectric
- Transfer
- Efficiency
- Efficiency% = usefull energy outputx100/ total energy output
- Work and Power
- WORK DONE = FORCE X DISTANCE
- POWER = ENERGY/ TIME
- Pressure
- PRESSURE = FORCE/AREA
- WATER PRESSURE= DENSITY X GRAVITY X HEIGHT
- Speed and Acceleration
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