Physics-
General
Easy
Question
An express train is moving with a velocity 
. Its driver finds another train is moving on the same track in the same direction with velocity 
. To escape collision, driver applies a retardation 
on the train. The minimum time of escaping collision will be
- None
- Both
The correct answer is:
As the train 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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