Posted by zl on Tuesday, July 10, 2012 at 9:00am.
v=vₒ+at, => vₒ=v-at,
s=vₒt+at²/2= (v-at)t+ at²/2 = vt- at²/2,
a=2(vt-s)/t² =2(10•50-200)/50²=0.24 m/s².
vₒ=v-at=10-0.24•50= - 2 m/s.
s1= vₒt1+at1²/2 = -2•60+0.24•60²/2=312 m.
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