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Paper 1
Energy
Conservation of Energy and Power
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Energy can be transferred usefully, stored or dissipated, but can never be
created
or
destroyed
Dissipated energy
is sometimes called
wasted energy
because it is
stored
in a way that is not
useful
Power
is the rate of
energy transfer
or rate of
doing work
Watt
= the
amount of energy transferred
in a
second
P
=
P =
P
=
E
T
\frac{E}{T}
T
E
Power
(
W
)
Energy Transferred
(
J
)
Time
(
s
)
P
=
P =
P
=
W
T
\frac{W}{T}
T
W
Power
(
W
)
Work done
(
J
)
Time
(
s
)
