Home
Class 11
PHYSICS
A 120 m long train is moving in a direct...

A 120 m long train is moving in a direction with speed 20 m/s . A traing B moving with 30 m/s in the opposite direction and 130 m long crosses the first train in a time

A

`6s`

B

`36s`

C

`38s`

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
D
`v_(A//B)=20+30=50 m//s`
`t=(l_(A)+l_(B))/50=(120+130)/50 =5s`
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • RELATIVE MOTION

    CP SINGH|Exercise EXERCISE|33 Videos

  • NEWTONS LAWS OF MOTION

    CP SINGH|Exercise EXERCISES|84 Videos

  • ROTATIONAL MOTION

    CP SINGH|Exercise Exercise|172 Videos

Similar Questions

Explore conceptually related problems

One train A 100m long is moving in a direction with a speed of 20m/s . Another train B 150m long is moving with a speed of 30m/s in the opposite direction.The train B crosses the train A in a time A) 5s B) 10s C) 18s D) None of these

A 150 m long train is moving in north direction with a velocity of 5m/s and a parrot is also moving in north direction with a velocity of 10 m/s, then find out (i) The time taken by parrot to cross the train (ii) Distance travel by the parrot during the crossing.

Knowledge Check

  • A 120 m long train is moving in a direction with a speed of 20ms^(-1) . Another train (130m long) moving with 30ms^(-1) in the opposite directon crosses the first train in a time

    A
    36 s
    B
    30 s
    C
    6 s
    D
    5 s

  • A train 350 m long is moving at the speed of 20 km/h. It will cross a man coming from the opposite direction at the speed of 1 km/h in ?

    A
    27 s
    B
    35 s
    C
    45 s
    D
    60 s

  • A train 350 m long is moving at the speed of 20 km/h it will cross a man coming from the opposite direction at the speed of 1 km/h in:

    A
    27 s
    B
    35 s
    C
    45 s
    D
    60 s

    • Similar Questions

    Explore conceptually related problems

    A 120 m long train is moving towards west with a speed of 10 m//s . A bird flying towards east with a speed of 5 m//s crosses the train. The time taken by the bird to cross the train will be

    A train 180 m long moving at the speed of 20 m/sec.Over-takes a man moving at a speed of 10m/sec in the same direction .The traiin passes the man in:

    A 100 m long train is moving at a speed of 60 km/h. Then, the train will cross a signal pole in

    A 100 m long train is moving at a speed of 60 km/h. Then, the train will cross a signal pole in

    A train 180m long moving at the speed of 20m/sec over -takes a man moving at a speed of 10m/sec in the same direction. The train passes the man in

    Home
    Profile