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v_p = 54 km/h = 54 1000/3600 m/s = 54 10/36 m/s = 15 m/s
v_k = 0
s = 200 m
szukane:
t = ?
a = (v_p - v_k)/t = v_p/t
s = at²/2
s = (v_p*t²/t)/2
s = (v_p*t)/2
2s = v_p*t
t = 2s/v_p
t = (400 m)/(15 m/s) = 26 2/3 s
s= 200m
t=?
t=s/V
t=200/54
t=3,7 s
v_p = 54 km/h = 54 1000/3600 m/s = 54 10/36 m/s = 15 m/s
v_k = 0
s = 200 m
szukane:
t = ?
a = (v_p - v_k)/t = v_p/t
s = at²/2
s = (v_p*t²/t)/2
s = (v_p*t)/2
2s = v_p*t
t = 2s/v_p
t = (400 m)/(15 m/s) = 26 2/3 s