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Last Updated On 23-10-2022 - By Sara

A metro train starts from rest and in five seconds achieves   After that it moves with constant velocity and comes to rest after travelling 45 m with uniform retardation.  If total distance travelled is 395 m, find total time of travelling

1)

12.2 s

2)

15.3 s

3)

9 s

4)

17.2 s


Question ID - 100378 :-

A metro train starts from rest and in five seconds achieves   After that it moves with constant velocity and comes to rest after travelling 45 m with uniform retardation.  If total distance travelled is 395 m, find total time of travelling

1)

12.2 s

2)

15.3 s

3)

9 s

4)

17.2 s

1 Answer
5876 Votes
3537

Answer Key : (4) -

Given,

From first equation of motion.

Or

So, distance travelled by metro train in 5 s

Distance travelled before coming to rest

So, from third equation of motion

Or

Time taken in travelling 45 m is

Now, total distance

Or

Hence, total time taken in whole journey



Next Question :

A small particle of mass is projected at an angle  with the -axis with an initial velocity  in the -  plane as shown in the figure.  the angular momentum of the particle is

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