Question

a body moves from rest with a uniform acceleration and travels 270 m in 3s find the velocity of the body at 10s after the start

Answer 1

First we will calculate acceleration.
We know 
s = ut + 1/2 a. t2 
or 270 = 0 . 3 + 1/2 . a. (3)2
Or a= (270 . 2) / 9
Or a= 60 m/s2 
Again We know that:
a = (v - u ) / t
Or 60 = (v - 0 )/ 10 
Or v = 60 . 10 
∴ v = 600 m/sAnswer


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