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t=15s
vk=90km/h
vp=0km/h
szukane:
a=?
s=?
90km/h = 25m/s
a=(vk-vp)/t = (90km/h-0km/h)/15s=90km/h /15s = 25m/s /15s=
= 1 2/3 [m/s²] (jeden i dwie trzecie)
s=1/2 * a *t²=1/2 * 1 2/3[m/s²] * 15²s² = 5/6[m/s²]* 225 s²=
=187 1/2 [m]
Odp:187 1/2 [m]