An express train is moving with a velocity v 1 . Its driver finds another train is moving on the same track in the same direction with velocity v 2 . To escape collision, driver applies a retardation a on the train. the minimum time of escaping collision will be
A
B
C
None
D
Both
Text Solution
Verified by ExpertsThe correct answer is:
A
As the trains are moving in the same direction. So the initial relative speed 
and by applying retardation final relative speed becomes zero.
From 
⇒ ⇒ 
⇒ ⇒ 
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