conservation and dissipation of energy- CH1
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Last updated 7:00 PM on 1/2/26
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11 Terms
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law of conservation of energy
energy cannot be created or destroyed
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closed system
where no energy transfers take place into or out of the system’s energy stores
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work done=
force x distance
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work
work is done on an object when a force makes the object move
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change in gpe=
mass x gfs x change in height OR weight x change in height
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gfs on earth
9\.8 n/kg
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kinetic energy=
0\.5 x mass x speed ^2
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elastic potential energy=
0\.5 x spring constant x extension ^2
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useful energy
energy in the place we want an need
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wasted energy
energy transferred where we don’t want, usually to the surroundings
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efficiency=
useful output/ input energy
