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Energy and Work Done - Coggle Diagram
Energy and Work Done
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Work
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Work is done when a force is exerted to move an object through a distance in the direction of the force applied
Sources of energy
Renewable
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Different sources
Wind
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👎: Need high wind velocity, large land area
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Solar
Energy used from the sun used by solar panels to generate heat or with solar cells to generate electricity
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👎: Great expanse of land, destroy habitats
Biofuels
The burning of animal and plant matter such as water hyacinth and sugar cane heats water to produce steam to drive turbines for generating electricity
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Geothermal
Heat energy from earth obtained by tapping hot rocks, to produce steam to drive turbines and generate electricity
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Non-renewable
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Sources
Fossil fuels
Take millions of years to form from the remains of plants and animals eg. coal, natural gas, crude oil
In power stations, fossil fuels are burnt to produce steam to drive turbines and generate electricity
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for exAms
how work is done?
say all energy conversions and include direction and force eg ( a exerts a _ force on b, allowing it to move in __ direction), hence work is done
horizontal/vertical/downward/upward/pushing/pulling force
Energy cannot be created or destroyed, but converted from one form to another. The total energy remains constant