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Natuurkunde Mechanica kracht imp arbeid etc v1.xls
Kracht, impuls, arbeid etc
Examenstof VWO * HAVO ^
Arbeid en energie
*
^
Kinetische energie
E
k
= 1/2 m v
2
* ^
Zwaarte energie
E
z
= m g h
E
k
[J]
=
E
z
[J]
=
m
[kg]
=
m
[kg]
=
v
[m s
-1
]
=
h
[m]
=
* ^
Arbeid
W= F s cos
α
W
[J]
=
F
[N]
=
s
[m]
=
α
[deg]
=
* ^
Wet van arbeid en kinetische energie
Σ W = 1/2 m v
2
2
- 1/2 m v
1
2
Σ W
[J]
=
m
[kg]
=
v
2
[m s
-1
]
=
v
1
[m s
-1
]
=
* ^
Rendement
η = (W
nuttig
/ E
in
) 100%
η
[-]
=
W
nuttig
[J]
=
E
in
[J]
=
* ^
Vermogen
P = F v
* ^
Vermogen
P = Δ E / Δ t
P
[W]
=
P
[W]
=
F
[N]
=
Δ E
[J]
=
v
[m s
-1
]
=
Δ t
[s]
=
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