Home
Class 11
PHYSICS
It is advised not to stand near a runnin...

It is advised not to stand near a running train. Why?

Text Solution

Verified by Experts

When a fast running train is crossing the platform, it aleo drags air along with it at high velocity. Now, according to Bernoulli.s equation, the pressure in the region where air has high velocity will be decreased than the surroundings. Thus, a person standing near the train experiences a push towards the train due to high pressure surrounding him and it may be fatal for him.
Promotional Banner

Topper's Solved these Questions

  • MECHANICAL PROPERTIES OF FLUIDS

    MODERN PUBLICATION|Exercise Problems|9 Videos

  • MECHANICAL PROPERTIES OF FLUIDS

    MODERN PUBLICATION|Exercise NCERT (Textbook Exercises)|20 Videos

  • MECHANICAL PROPERTIES OF FLUIDS

    MODERN PUBLICATION|Exercise Practice Problems|52 Videos

  • MATHEMATICAL TOOLS

    MODERN PUBLICATION|Exercise PRACTICE PROBLEMS (10)|12 Videos

  • MOTION IN A PLANE

    MODERN PUBLICATION|Exercise Chapter Practice Test|15 Videos

Similar Questions

Explore conceptually related problems

When a person is standing on earth, the treesand houses appera stationary to mim. However, when he is sitting in a running train all these obects appear to move in bakward direction. Why?

There are two trains running on two parallel tracks. Length of each train is 120 m. When they are running in opposite directions, they cross each other in 4 seconds and when they are running in the same direction they cross in 12 seconds. What is the speed of the faster train?

What is the length of a running train ? (i) The train crosses a man in 9 seconds (ii) The train crosses a 240 metre long platform in 24 seconds.

Why it is not advisable to sleep under a tree at night?

A train crosses another train running in the opposite direction in x seconds. What is the speed of the train ? I. Both the trains are running at the same speed. II. The first train is y cm long.

MODERN PUBLICATION-MECHANICAL PROPERTIES OF FLUIDS-Conceptual Questions
  1. Give reason for the following: (a) Machine parts get jammed in the w...

    Text Solution

    |

  2. Explain the reason behind: (a) Use of parachutes while jumping from ...

    Text Solution

    |

  3. It is advised not to stand near a running train. Why?

    Text Solution

    |

  4. A student tries to remove a filter paper from a funnel by blowing air ...

    Text Solution

    |

  5. Does Archimede's principle hold in a vessel in free fall?

    Text Solution

    |

  6. What will happen if the water is replaced by another liquid whose denn...

    Text Solution

    |

  7. A boy is carrying a fish in one hand and a bucket full of water in the...

    Text Solution

    |

  8. It is often observed that a sinking ship turns over as it becomes imme...

    Text Solution

    |

  9. Consider a barometer tube filled with mercury as shown in the adjoinin...

    Text Solution

    |

  10. Is Archimedes' principle valid in a lift which is (a) accelerating u...

    Text Solution

    |

  11. When a pipe, through which water is flowing out, is partially closed w...

    Text Solution

    |

  12. A ball is held submerged just below the water surface in a vessel. It ...

    Text Solution

    |

  13. A water pipe is pointed straight up and water flows out from it with c...

    Text Solution

    |

  14. To a block of wood, a metal sphere is attached with the help of a stri...

    Text Solution

    |

  15. Two solid spheres of same size, of one iron and other of copper, are s...

    Text Solution

    |

  16. A small piece of iron is tied to a wooden block and the compound block...

    Text Solution

    |

  17. A block of ice with a large pebblle frozen inside it is floating on wa...

    Text Solution

    |

  18. An ice cube containing a piece of lead floats in water What would be t...

    Text Solution

    |

  19. A wooden block is floating on water at 1^@C with volume v above the wa...

    Text Solution

    |

  20. While sewing, a person often wets the end of a thread before, trying t...

    Text Solution

    |