KinematicsHard

Question

A body starts from rest and is uniformly accelerated for 30 s. The distance traveled in the first 10 s is x1, next 10 is x2 and the last 10 s is x3. Then x1 : x2 : x3 is the same as :-

Options

A.1 : 2 : 4
B.1 : 2 : 5
C.1 : 3 : 5
D.1 : 3 : 9

Solution


x1 = a(10)2
x1 + x2 = a(20)2 
x1 + x2 + x3 =a(30)2 
⇒ x1 : x2 : x3 = 1 : 3 : 5

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