Home
Class 9
PHYSICS
A pebble is dropped freely in a well fro...

A pebble is dropped freely in a well from its top. It takes 20 s for the pebble to reach the water surface in the well. Taking `g = "10 m s"^(-2)` and speed of sound = `330 "m s"^(-1)`. Find the depth of water surface

Text Solution

Verified by Experts

2000 m
Promotional Banner

Topper's Solved these Questions

  • LAWS OF MOTION

    ICSE|Exercise EXERCISE - 3(E) (Multiple choice type)|5 Videos

  • ICSE ANNUAL EXAMINATION -2020

    ICSE|Exercise SECTION-II|45 Videos

  • LIGHT

    ICSE|Exercise TOPIC 2 Spherical Mirrors (4 Marks Questions )|9 Videos

Similar Questions

Explore conceptually related problems

A pebble is dropped freely in a well from its top. It takes 20 s for the pebble to reach the water surface in the well. Taking g = "10 m s"^(-2) and speed of sound = 330 "m s"^(-1) . Find the time when sound is heard after the pebble is dropped.

A stone is dropped freely in a river from a bridge. It takes 5 s to touch the water surface in the river. Calculate :the distance covered by the stone in the first 2 s (g = 9.8 m s^(-2) ).

A stone is dropped freely in a river from a bridge. It takes 5 s to touch the water surface in the river. Calculate : the height of the bridge from the water level .

A body is dropped freely under gravity from the top of a tower of height 78.4 m. Calculate : (i) the time to reach the ground . Take g = 9.8 m s^(-2) .

A stone is dropped freely from the top of a tower and it reaches the ground in 4 s. Taking g = 10 m s^(-2) , calculate the height of the tower.

A stone is dropped from the top of a tower 500 m high into a pond of water at the base of the tower. When is the splash heard at the top ? Given, g = 10 m//s^2 and speed of sound = 340 m//s .

A body is dropped from the top of a tower. It acquires a velocity 20 m s^(-1) on reaching the ground. Calculate the height of the tower. (Take g = 10 m s^(-2) )

A body is dropped freely under gravity from the top of a tower of height 78.4 m. Calculate : the velocity with which it strikes the ground. Take g = 9.8 m s^(-2) .

A ball is thrown upward with speed 10 m/s from the top to the tower reaches the ground with a speed 20 m/s. The height of the tower is [Take g=10m//s^(2) ]

A ball is thrown up at a speed of 4.0 m/s. Find the maximum height reached by the ball. Take g=10 m//s^2 .

ICSE-LAWS OF MOTION-EXERCISE - 3(E) (Numericals)
  1. A ball is released from a height and it reaches the ground in 3 s. If ...

    Text Solution

    |

  2. A ball is released from a height and it reaches the ground in 3 s. If ...

    Text Solution

    |

  3. What force, in newton, your muscles need to apply to hold a mass of 5 ...

    Text Solution

    |

  4. A ball is thrown vertically upwards. It goes to a height 20 m and then...

    Text Solution

    |

  5. A ball is thrown vertically upwards. It goes to a height 20 m and then...

    Text Solution

    |

  6. A ball is thrown vertically upwards. It goes to a height 20 m and then...

    Text Solution

    |

  7. A body is dropped from the top of a tower. It acquires a velocity 20 m...

    Text Solution

    |

  8. A ball is thrown vertically upwards. It returns 6 s later. Calculate t...

    Text Solution

    |

  9. A ball is thrown vertically upwards. It returns 6 s later. Calculate t...

    Text Solution

    |

  10. A pebble is thrown vertically upwards with a speed of 20 m s^(-1). How...

    Text Solution

    |

  11. How long will a stone take to fall to the ground from the top of a bui...

    Text Solution

    |

  12. How long will a stone take to fall to the ground from the top of a bui...

    Text Solution

    |

  13. A body falls from the top of a building and reaches the ground 2.5 s l...

    Text Solution

    |

  14. A ball is thrown vertically upwards with a velocity of 49 m/s. Calcula...

    Text Solution

    |

  15. A ball is thrown vertically upwards with an initial velocity of 49 m s...

    Text Solution

    |

  16. A stone is dropped freely from the top of a tower and it reaches the g...

    Text Solution

    |

  17. A pebble is dropped freely in a well from its top. It takes 20 s for t...

    Text Solution

    |

  18. A pebble is dropped freely in a well from its top. It takes 20 s for t...

    Text Solution

    |

  19. A ball is thrown vertically upwards from the top of a tower with an in...

    Text Solution

    |

  20. A ball is thrown vertically upwards from the top of a building of heig...

    Text Solution

    |