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2010-02-24T15:04:33+01:00
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dane a=2m/s2, s=400m, vo=0
szukane t, vk

s = 0,5 at2.........v = at......t = v/a
s = 0,5a*[v/a]2 = 0,5*v2/a
v2 = 2as = 2*2m/s2*400m = 1600m2/s2
v = 40m/s

t = v/a = 40m/s/2m/s2 = 20s

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