Home
Class 9
PHYSICS
If a ball is thrown in upward direction ...

If a ball is thrown in upward direction it attains maximum height of 7.2 m. What would be the initial velocity of this ball? `("Take g=10 ms"^(-2))`

A

`7.2ms^(-1)`

B

`14.4 ms^(-1)`

C

`12ms^(-1)`

D

`144ms^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
C
For upward motion of the object of maximum height.
`u^(2)=2gh=2 xx 10 xx 7.2 =144`
`u=12ms^(-1)`
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 ball is thrown upward and attains the maximum height 10 m. The initial velocity of this ball would be ……... ms^(-1)

A ball thrown in vertically upward direction attains maximum height of 16 m. At what height would its velocity be half of its initial velocity ?

A ball thrown in vertically upward direction attains maximum height of 20 meter. At what height would its velocity be half of its initiall velocity?

An object of mass 2kg is thrown in the upward direction with velocity of 3ms^(-1) . What would be the maximum potential energy of this object?

A boy lifts a mass of 300g for 1.2 second at height of 4m. What would be the power of boy? (Take g=10ms^(-2) ).

A body projected in vertical direction attains maximum height 50 m . Find its velocity at 25 m .height

KUMAR PRAKASHAN-GRAVITATION-Choose The Correct Option
  1. If the mass and radius of a planet are twice the mass and radius of th...

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

  11. The magnitude of gravitational acceleration of the earth

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

  20. The weight of a given object on the centre of the earth of radius Re i...

    Text Solution

    |