Q. A body travels for 15 seconds starting from rest with constant acceleration. If it travels distances and in the first five seconds, second five seconds and next five seconds respectively, then the relation between and is

 6607  201 Motion in a Straight Line Report Error

Solution:

Let a be uniform acceleration of the body.
As
Then,


Subtract from , we get

(Using )
Subtract from , we get

(Using )
Thus,