Answers

2014-07-22T09:12:59+05:30
Equation for distance travelled in one second in uniform acceleration is
s=u+a(2n-1)/2
 u-intial velocity
 a-acceleration
55=u+a/2(2*8-1)=u+7.5a.....(1)
similarly 85=u+12.5a.....(2)
(2)-(1)
5a=30  
a= 6 m s⁻²
therefore u=55-7.5(6)=55-45=10 m s⁻¹ 
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