Work, Power And Energy Flashcards
(32 cards)
Units for force
Newtons
Work
Work = force x distance
Unit for work
Joules
The unit for power
Watt
Power
Work done/time taken
Work (sentence)
Applying force in an object moving a particular distance
Power (word)
The rate at which work is done
Energy (word)
The ability to do work
Unit for energy
Joule
Kinetic energy
Moving objects e.g car moving
Potential energy
Changing shape or position of a object e.g wind up a clock you tighten the spring
Sound energy
When a sound is made e.g strumming a guitar
Heat energy
It causes movement e.g some water in the kettle evaporates
Chemical energy
It causes movement but isn’t as obvious e.g food contains chemicals it causes us to move
Electrical energy
A good example of a form of energy causing movement e.g electric cars has powerful motors
Magnetic energy
Magnets that causes movement e.g magnets used in scrap yards to lift metal like cars
Solar energy
Is taken from the rays of the sun it is converts solar energy into electrical energy using solar cells.solar panels
Nuclear energy
In nuclear fission the nucleus is split releaseing energy
The principle of conservation of energy
The fact energy is never used up, it changes into another form of energy
Groups of energy sources
Non-renewable sources of energy
Renewable sources of energy
Non renewable sources of energy
Oil, coal, gas, turf
Advantages of non-renewable sources of energy
Easy to get
Reasonably cheap
Disadvantages of non renewable sources of energy
Causes greenhouse gas emissions
Polluting the atmosphere
Sources of renewable energy
Solar energy
Hydro-electricity
Wind energy
Nuclear energy
