Home
Class 11
PHYSICS
Two balls are dropped from heights h and...

Two balls are dropped from heights `h` and `2h` respectively from the earth surface. The ratio of time of these balls to reach the earth is.

A

`1 : sqrt(2)`

B

`sqrt(2) : 1`

C

`2 : 1`

D

`1 : 2`

Text Solution

Verified by Experts

The correct Answer is:
A
`t=sqrt((2h)/(g))` or `t prop sqrt(h) rArr (t_(1))/(t_(2))= sqrt((h)/(2h))=1: sqrt(2)`
Promotional Banner

Topper's Solved these Questions

  • MOTION IN A PLANE

    DC PANDEY ENGLISH|Exercise Check point 3.6|20 Videos

  • MOTION IN A PLANE

    DC PANDEY ENGLISH|Exercise Check point 3.7|15 Videos

  • MOTION IN A PLANE

    DC PANDEY ENGLISH|Exercise Check point 3.4|15 Videos

  • MOTION

    DC PANDEY ENGLISH|Exercise Medical entrances gallery|19 Videos

  • PROJECTILE MOTION

    DC PANDEY ENGLISH|Exercise Level - 2 Subjective|10 Videos

Similar Questions

Explore conceptually related problems

A ball A of mass m falls on the surface of the earth from infinity. Another ball B of mass 2m falls on the earth from the height equal to six times the radius of the earth. Then ratio of velocities of A and B on reaching the earth is sqrt(x//y) where x and y are coprimes. Find x+y .

A wooden ball and an iron ball are dropped from the same height h in vaccum. If their radii are the same then the time taken by then to reach the ground are

A ball is projected upwards from a height h above the surface of the earth with velocity v. The time at which the ball strikes the ground is

A ball is projected upwards from a height h above the surface of the earth with velocity v. The time at which the ball strikes the ground is

A ball is dropped from a spacecraft revolving around the earth at a height of 1200km . What will happen to the ball ? .

A ball A is projected from the ground such that its horizontal range is maximum. Another ball B is dropped from a height equal to the maximum range of A. The ratio of the time of flight of A to the time of fall of B is

A ball of mass m is dropped from a height h equal to the radius of the earth above the tunnel dug through the earth as shows in the figure. Choose the correct options. (Mass of earth = M )

The balls are released from the top of a tower of heigh H at regular interval of time. When first ball reaches at the grund, the nthe ball is to be just released and ((n+1))/(2) th ball is at some distance h from top of the tower. Find the value of h .

A ball is dropped from a height of 5 m, if it rebound upto height of 1.8 m, then the ratio of velocities of the ball after and before rebound is :

A stone drop from height h reaches to earth surface in 1 sec. if the same stone taken to moon and drop freely then it will reaches from the surface of the moon in the time (the 'g' of moon is 1/6 times of earth)-

DC PANDEY ENGLISH-MOTION IN A PLANE-Check point 3.5
  1. If a stone is thrown up with a velocity of 9.8 ms^(-1), then how much ...

    Text Solution

    |

  2. A stone falls freely rest. The distance covered by it in the last seco...

    Text Solution

    |

  3. A stone is thrown vertically upwards with an initial speed u from the ...

    Text Solution

    |

  4. A body is thrown vertically upwards from A. The top of a tower . It re...

    Text Solution

    |

  5. A body is projected upwards with a velocity u. It passes through a cer...

    Text Solution

    |

  6. A helicopter rises from rest on the ground vertically upwards with a c...

    Text Solution

    |

  7. A particle (A) is dropped from a height and another particle (B) is th...

    Text Solution

    |

  8. A particle is dropped from top of tower. During its motion it covers (...

    Text Solution

    |

  9. A ball dropped from the top of a tower covers a distance 7x in the las...

    Text Solution

    |

  10. A body falls from a height h = 200 m (at New Delhi). The ratio of dist...

    Text Solution

    |

  11. A stone is thrown vertically upwards. When stone is at a height half o...

    Text Solution

    |

  12. When a ball is thrown up vertically with velocity v0, it reaches a max...

    Text Solution

    |

  13. A man in a balloon rising vertically with acceleration 4.9m//s ^(2) ...

    Text Solution

    |

  14. A body freely falling from the rest has velocity v after it falls thro...

    Text Solution

    |

  15. Two balls are dropped from heights h and 2h respectively from the eart...

    Text Solution

    |

  16. An aeroplane is moving with a velocity u. It drops a packet from a hei...

    Text Solution

    |

  17. For a particle moving along a straight line, the displacement x depend...

    Text Solution

    |

  18. The acceleration of a particle is increasing linearly with time t as b...

    Text Solution

    |

  19. The acceleration a in ms^-2 of a particle is given by a=3t^2+2t+2, whe...

    Text Solution

    |

  20. A particle is moving such that s=t^(3)-6t^(2)+18t+9, where s is in met...

    Text Solution

    |