Ep = Ek
mgh = mV²/2 |*2
2mgh = mV² |:m
2gh = V²
V = √2gh
V = √(2*10m/s²*5m)
V = √100m²/s²
V = 10m/s
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Ep = Ek
mgh = mV²/2 |*2
2mgh = mV² |:m
2gh = V²
V = √2gh
V = √(2*10m/s²*5m)
V = √100m²/s²
V = 10m/s
Dane:
h = 5m
g = 10m/s²
Szukane:
v = ?
t = ?
Wzory:
t = √2h/g
v = at → v = gt (bo: a = g)
t = √2×5m:10m/s²
t = √1[m×s²/m] Metry skrócą się.
t = √1s²
t = 1s
v = 10m/s²×1s
v = 10m/s
Odp.: Zlodowaciały śnieg uderza w ziemię z szybkością 10m/s .