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Energy

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Thanks.
(edited 10 years ago)
Original post by Tynos
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Thanks.


We'll need the whole question, so we know what's going on.
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Tynos
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Original post by PythianLegume
We'll need the whole question, so we know what's going on.


I have edited it xD
Original post by Tynos
yy.png y2.pngy1.png

Thanks.


The wasted energy is the energy not used to increase speed, or gain height. Therefore, it is the difference between the input energy and the change in kinetic and potential energy.
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Original post by PythianLegume
The wasted energy is the energy not used to increase speed, or gain height. Therefore, it is the difference between the input energy and the change in kinetic and potential energy.


But i thought that GPE=KE?
Original post by Tynos
But i thought that GPE=KE?


Not in this case. If you were letting something fall down, then GPE=KE, but in this case you are moving upwards - doing work against gravity, and to accelerate the bike forwards. The wasted energy has been used to work against frictional forces and create heat and sound in the engine.
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Original post by PythianLegume
Not in this case. If you were letting something fall down, then GPE=KE, but in this case you are moving upwards - doing work against gravity, and to accelerate the bike forwards. The wasted energy has been used to work against frictional forces and create heat and sound in the engine.



Ahh ok thank you!

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