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Physics
General Physics
Work and Power
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Created by
Robin Jack
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Cards (8)
Work
is done whenever a force makes something move
1 joule of work =
force
of 1 Newton moves an
object
by
1 meter
The unit for work is the
Joule
(J).
The formula for
work
is:
W
o
r
k
d
o
n
e
(
J
)
=
Work\ done\ \left(J\right)\ =
W
or
k
d
o
n
e
(
J
)
=
F
o
r
c
e
(
N
)
x
D
i
s
tan
c
e
(
m
)
\ Force\ \left(N\right)\ x\ Dis\tan ce\ \left(m\right)
F
orce
(
N
)
x
D
i
s
tan
ce
(
m
)
or
W
=
W\ =
W
=
F
D
\ FD
F
D
Power
is the rate of work
The unit for power is
Watts
(W)
1
Watt =
1Joule
/
second
The formula for
power
is:
P
o
w
e
r
(
W
)
=
Power\ \left(W\right)\ =
P
o
w
er
(
W
)
=
W
o
r
k
D
o
n
e
(
J
)
T
i
m
e
T
a
k
e
n
(
s
)
\ \frac{Work\ Done\ \left(J\right)}{Time\ Taken\ \left(s\right)}
T
im
e
T
ak
e
n
(
s
)
W
or
k
Do
n
e
(
J
)