Question

A body starts from rest and is accelerated uniformly. Find the ratio of the distances travelled by it in first, second and third seconds.

Answer 1

Applying s = ut+1/2at^2

For the 1st second
   s = 1/2at^2
s = 1/2 x a

For the 2nd second,
s = 1/2 a x 4 = 2a

For the 3rd second,
s = 1/2 x a x 9 = 4.5a
ratio = 1:4:9
∴ ratio =  =