the velocity of car changes from 18km\hto72km\h in30 s what will. be it's acceleration in km\hand m\s²
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v=72km/h =72×5/18=20m/s
u=18km/h=18×5/18=5m/s
a=v-u/t
a=20-5/2=15/2=7.5m/s
u=18km/h=18×5/18=5m/s
a=v-u/t
a=20-5/2=15/2=7.5m/s
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