Oblicz energię mechaniczną kury o masie 2 kg lecącej na wysokości 100 m z prędkością 10 m/s .
dane:
m = 2 kg
h = 100 m
v = 10 m/s
g = 10 m/s2
szukane:
E = ?
E = Ep + Ek
E = mgh + mv^2 /2
E = 2kg x 10m/s2 x 100m + 2kg x (10m/s)^2 /2 = 2 100 kg*m2/s2 = 2 100 J
1 kJ = 1000 J
E = 2,1 kJ
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dane:
m = 2 kg
h = 100 m
v = 10 m/s
g = 10 m/s2
szukane:
E = ?
E = Ep + Ek
E = mgh + mv^2 /2
E = 2kg x 10m/s2 x 100m + 2kg x (10m/s)^2 /2 = 2 100 kg*m2/s2 = 2 100 J
1 kJ = 1000 J
E = 2,1 kJ
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