Home
Class 9
PHYSICS
A stone falling freely on the terrace of...

A stone falling freely on the terrace of the building takes 4s to reach the ground. What would be the height of his building?

A

9.8m

B

`(2 xx 9.8)m`

C

`(4 xx 9.8)m`

D

`(8xx 9.8)m`

Text Solution

Verified by Experts

The correct Answer is:
D
For a freely falling object.
`h=1/gt^(2)=1/2 xx 9.8 xx (4)^(2)`
`=(8 xx 9.8)m`
Promotional Banner

Topper's Solved these Questions

  • GRAVITATION

    KUMAR PRAKASHAN|Exercise Fill in the blanks : |27 Videos

  • GRAVITATION

    KUMAR PRAKASHAN|Exercise True & False|21 Videos

  • GRAVITATION

    KUMAR PRAKASHAN|Exercise Questions And Answers|32 Videos

  • FORCE AND LAWS OF MOTION

    KUMAR PRAKASHAN|Exercise Question based on pracctical skill with answers(Select the appropriate option and complete the sentence :)|4 Videos

  • MOTION

    KUMAR PRAKASHAN|Exercise FILL IN THE BLANKS |50 Videos

Similar Questions

Explore conceptually related problems

A particle is projected from the ground at an angle such that it just clears the top of a polar after t_1 time its path. It takes further t_2 time to reach the ground. What is the height of the pole ?

A body is released from the top of a tower of height h. It takes t sec to reach the ground. Where will be the ball after time (t)/(2) sec?

A body is falling from height 'h' it takes t_(1) time to rech the ground. The time taken to cover the first half of height is:-

If a ball fallen freely from 'h' height reaches in time 't' at ground, then what will be the time when it reaches at height h/2 ?

A freely falling object eventually stops on reaching the ground. What happens to its kinetic energy?

Rinky observes a flower on the ground from the balcony of the first floor of a building at an angle of depression beta^(@) . The height of the first floor of the building is x meters. Draw the diagram for this data.

A hiker stands on the edge of cliff 490 m above the ground and throws a stone horizontally with an initial speed of 15 " m s "^(-1) Neglecting air resistance , find the time taken by the stone to reach the ground , and the speed with which it hits the ground . (Take g=9.8 " m s"^(2)) .

KUMAR PRAKASHAN-GRAVITATION-Choose The Correct Option
  1. The relation between G and g is……

    Text Solution

    |

  2. If the mass and radius of a planet are twice the mass and radius of th...

    Text Solution

    |

  3. A stone falling freely on the terrace of the building takes 4s to reac...

    Text Solution

    |

  4. If a ball is thrown in upward direction it attains maximum height of 7...

    Text Solution

    |

  5. An object having mass 1 kg is falling freely. Its velocity is 29.4 ms^...

    Text Solution

    |

  6. If a piece of stone is brought to earth from the surface of moon, then...

    Text Solution

    |

  7. If the distance between two objects is halved, what change would occur...

    Text Solution

    |

  8. At which of the following places locations the magnitude of g is the m...

    Text Solution

    |

  9. What would be the weight an object on the moon, whose weight on earth ...

    Text Solution

    |

  10. If pressure is to be doubled keeping the force acting an the surface c...

    Text Solution

    |

  11. Two objects of different masses fall freely from certain height toward...

    Text Solution

    |

  12. The magnitude of gravitational acceleration of the earth

    Text Solution

    |

  13. The distance between two objects is doubled. The gravitational force a...

    Text Solution

    |

  14. A boy moves a stone tied to a string on horizontal circular path. If t...

    Text Solution

    |

  15. An object is placed in three liquids having different densities d1, d2...

    Text Solution

    |

  16. In the formula F=(GMm)/(d^(2))………

    Text Solution

    |

  17. Universal law of gravitation is used only when the gravitational force...

    Text Solution

    |

  18. The magnitude of 'G' as per universal law of gravitation ...

    Text Solution

    |

  19. The atmosphere of the earth is attached with the earth due to ...........

    Text Solution

    |

  20. The force existing between two particles having mass 1 unit and at a d...

    Text Solution

    |