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Calculate initial velocity and acceleration of particle travelling with uniform acceleration in a straight line if it travels 55 m in the 8th second and 85

m in the 13th second of its motion



Equation for distance travelled in one second in uniform acceleration is
 u-intial velocity
similarly 85=u+12.5a.....(2)
a= 6 m s⁻²
therefore u=55-7.5(6)=55-45=10 m s⁻¹ 
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