1.
se cunosc: se cer:
F = 200 N P.disipata
d= 3 cm = 0,03 m
t = 0,5 s
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P = L/dt
L = Fxd => P = Fxd/t = 200x0,03/0,5
=> P.disipata = 12 W => c)
2.
se cunosc: se cer:
m= 5 t = 5000 kg P.minim
v = 30 m/s
---------------------------------------------------//--
P = L/dt
L = Fxd
F = G => P = mxgxd/t = 5000x10x30
=> P.minima = 1500000 W = 1,5x10la6 W => c)
