1.Dane: Szukane:
m=25kg trójkąt Ep=?
g=10m/s2
h=8m
2.Dane: Szukane:
m=2kg h=?
Ep=400j
g=10m/s2 h=400j/2kg x 10m/s2=?
3.Dane: Szukane:
m=1800kg Ek=?
v=120km/h Ek=1/2m x v2=
1/2 x 1800kg x (33m/s2)
za wszystko dzięki
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1.Dane: Szukane:
m=25kg Ep=?
g=10m/s2
h=8m
Ep=mgh
Ep= 25kg * 10m/s²*8m=2 000 J
2.Dane: Szukane:
m=2kg h=?
Ep=400j
g=10m/s∛
Ep=mgh
h=Ep/mg
h=400J/2kg * 10m/s² = 400J/ 20(kg *m/s²)=20m
3.Dane: Szukane:
m=1800kg Ek=?
v=120km/h=120 * 1000/3600≈33[m/s]
Ek=mv²/2
Ek=(1800 * 33²)/2= (1800 *59400)/2= 53 460 000 [J]
1.
Dane:
m = 25kg
g = 10m/s2
h = 8m
Szukane:
Ep = ?
Ep = m * g * h
Ep = 25kg * 10m/s2 * 8m
Ep = 2 000J
2.
Dane:
m = 2kg h=?
Ep = 400J
g = 10m/s2
Szukane:
h = ?
h = 400J/2kg * 10m/s2
h = 400J/20[kg * m/s2]
h = 20m
3.
Dane:
m = 1800kg
v = 120km/h
Szukane:
Ek = ?
Ek = 1/2m * v2
Ek = 1/2 * 1800kg x (33m/s2)
Ek = 900kg * 33m/s2
Ek = 29 700J
W tym 3 zadaniu coś pokręciłeś..