Published by:
CGP EDU Academic Team
Published on: August 14, 2026
A particle is moving on a straight line, where its position s (in metre ) is a function of time t (in seconds) given by 
. If it is known that the particle comes to rest after 4 seconds at a distance of 16 metre from the starting position 
, then the retardation in its motion is
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
B
Given equation 
……(i)
Differentiating w.r.t. time, we get
Velocity ( v ) 
……(ii)
After 4 sec, 
and distance 
…..(iii)
and 
⇒ ⇒ 
But retardation in its motion is, 
Retardation 
(Retardation itself means – ve ).
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