Home
Class 12
PHYSICS
A train is moving slowly on a straight t...

A train is moving slowly on a straight track with a constant speed of `2" m s"^(-1)` . A passengers in the train starts walking at a stready speed of `2" m s"^(-1)` to the back of the train in the opposite direction of the motion of the train. So to an observer standing on the platform directly in front of that passenger, the velocity of the passenger appears to be

A

2 `ms^(-1)` in the opposite direction of the train

B

zero

C

4`ms^(-1)`

D

2 `ms^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
b

For an observer standing on the platform net velocity of passenger will be zero becouse 2+(-2)=0.
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • DESCRIPTION OF MOTION IN ONE DIMENSION

    MODERN PUBLICATION|Exercise Revision Test|45 Videos
  • DESCRIPTION OF MOTION IN ONE DIMENSION

    MODERN PUBLICATION|Exercise MULTIPLE CHOICE QUESTION (LEVEL-II)|54 Videos
  • CURRENT ELECTRICITY

    MODERN PUBLICATION|Exercise RECENT COMPETITIVE QUESTIONS|32 Videos
  • DESCRIPTION OF MOTION IN TWO AND THREE DIMENSION

    MODERN PUBLICATION|Exercise Revision TEST|36 Videos

Similar Questions

Explore conceptually related problems

A constant force acting on a body of mass 3.0 kg changes its speed from 2.0 m s^(-1) to 3.5 m s^(-1) in 25 s. The direction of the motion of the body remains unchanged. What is the magnitude and direction of the force ?

A passenger train travelling at 30ms^(-1) covers the railway platform of length 100 m in 6 seconds. Find the length of the train. If the train covers the two hills separated by a certain linear distance in 20 s then calculate the distance between the hills.

Knowledge Check

  • The extinction of passenger pigeon was due to :

    A
    Increased number of predatory birds
    B
    Over exploitation by humans.
    C
    Non - availability of the food
    D
    Bird flu virus infection.
  • A 120 m long train is moving towards west at a speed of 10 ms^(-1) .A small bird flying towards east at a speed of 5 ms^(-1) crosses the train. What is time taken by the bird to cross the train :

    A
    4 s
    B
    8 s
    C
    12 s
    D
    24 s
  • A train is moving with a speed of 54 km/h. A monkey is running on the roof of a train against its motion with a speed of 5 ms. w.ut the train. The velocity of the monkey as observed by a man on the ground is :

    A
    `20 ms^(-1)`
    B
    `15ms^(-1)`
    C
    `10ms^(-1)`
    D
    `5ms^(-1)`
  • Similar Questions

    Explore conceptually related problems

    A train is running at a speed of 72km/h. It crosses a bridge of length half kilometer in 1 min. Calculate the length of the train.

    If five seats are vacant in a train, the number of ways three passengers can sit is:

    A train is travelling at the speed of 90km/h. Brakes are applied so as to produce a uniform acceleration of 0.5m/ s^(2) . Find how far the train will go before it is brought to rest.

    A train is moving at a speed of 72 kmph towards a station sounding a whistle of frequency 640Hz. What is the apparent frequency of the whistle as heard by a man standing on the platform when train approaches towards him.

    A train is moving on a straight track with speed 20 ms^(-1) . It is blowing its whistle at the frequency of 1000 Hz. The percentage change in the frequency heard by a person standing near the track as the train passes him is (speed of sound = 320 ms^(-1) ) close to :