Odpowiedzi

2013-07-04T14:31:25+02:00

dane:

H = 20 m

h = 5 m

g = 10 m/s²

szukane:

v = ?

 

H - h = gts²/2

ts = √[2(H-h)/g]

 

v = g * ts

v = g * √[2(H-h)/g]

v = √[2(H-h)/g] = √[2*(20m-5m)/10m/s²] = √(300m²/s²) = √(25*12) m/s

v = 5√12 m/s

v ≈17,32 m/s

-----------------