Home
Class 12
PHYSICS
A balloon is rising vertically up with a...

 A balloon is rising vertically up with a velocity of 29 `ms^(-1)`. A stone is dropped from it and it reaches the ground in 10 seconds. The height of the balloon when the stone was dropped from it is

A

400m

B

150m

C

100m

D

200m

Text Solution

Verified by Experts

The correct Answer is:
D
From equation of motion, h=`ut+(1)/(2)gt^(2)` as direction of balloon is upward from which stone . is thrown down. Thus, `h=ut+(1)/(2)gt^(2)` = `-29xx10+(1)/(2)xx9.8xx10^(2)`
= 290 + 490 - 200 m.
Promotional Banner

Topper's Solved these Questions

  • PHYSICS

    KCET PREVIOUS YEAR PAPERS|Exercise MCQs|66 Videos

  • SOLVED PAPER 2011

    KCET PREVIOUS YEAR PAPERS|Exercise PHYSICS|60 Videos

Similar Questions

Explore conceptually related problems

From a balloon ascending with a velocity of 9.8 ms^(-1) , a stone was dropped and it reached the ground in 11s . How high was the balloon when the stone was dropped and with what velocity did it hit the ground ? (g 9.8 ms^(-2) ) .

A ball is thrown vertically upwards with a velocity of 20 ms^(-1) from the top of a multistorey building. The height of the point from where the ball is thrown is 25.0 m from the ground. (a) How high will the ball rise ? and (b) how long will it be before the ball hits the ground ? Take g = 10 ms^(-2) .

A balloon is going vertically upward with a velocity of 15 ms^-1 . When it is at a height of 50 m above the ground a stone is gently dropped from it. The stone will reach the ground in time (take g = 10 ms^-2) :

A ball is thrown vertically upwards with a velocity of 50ms^(-1) and the same later thrown at an angle for the maximum range. Compare the heights reached in the two cases (g=9.8ms^(-2))

A stone is thrown vertically upwards with a velocity of 20ms^(-1) from the top of a tower 96 m high. After what time will it reach the foot of the tower ? What will be the velocity of the stone reaching the point of projection? At what velocity will it strike the ground ? (g=9.8 ms^(-2))

A man in a balloon rising vertically with an acceleration of 4.9 ms releases a ball 2 second after the balloon is let go from the ground. The greatest height above the ground reached by the ball is:

A balloon is going upwards with a velocity of 20 m It releases a packet when it is at a height of 160 m from the ground. The time taken by the packet to reach the ground is

A body is thrown up from the top of a tower with some velocity reaches the ground in 16 second. The same body if thrown with same velocity in downward direction reaches the ground in 4 second. If the body is just dropped from the tower, then it will reach the ground in time:

KCET PREVIOUS YEAR PAPERS-SOLVED PAPER 04-PHYSICS
  1. A thin plano-convex lens acts like a concave mirror of focal length 0....

    Text Solution

    |

  2. The physical quantity having the same dimensions as Planck's constant ...

    Text Solution

    |

  3. A balloon is rising vertically up with a velocity of 29 ms^(-1). A sto...

    Text Solution

    |

  4. A thread is tied slightly loose to a wire frame as in figure and the f...

    Text Solution

    |

  5. Oxygen is 16 times heavier than hydrogen. Equal volumes of hydrogen an...

    Text Solution

    |

  6. If two waves of the same frequency and amplitude respectively on super...

    Text Solution

    |

  7. A man, standing between two cliffs, claps his hands and starts hearing...

    Text Solution

    |

  8. A beam of light of wavelength 600 nm from a distant source falls on a ...

    Text Solution

    |

  9. Specific rotation of sugar solution is 0.01 SI units. 200 kg-m^(-3) of...

    Text Solution

    |

  10. An electron is accelerated through a potential difference of 45.5 volt...

    Text Solution

    |

  11. An unknown resistance R1 is connected in series with a resistance of 1...

    Text Solution

    |

  12. In the circuit shown, the internal resistance of the cell is negligibl...

    Text Solution

    |

  13. A rectangular coil of 300 tums has an average area of 25 cmxx10cm. The...

    Text Solution

    |

  14. In a LCR series circuit, the potential difference between the terminal...

    Text Solution

    |

  15. A vertical circular coil of radius 0.1 m and having 10 tums carries a ...

    Text Solution

    |

  16. The spectrum obtained from the chromosphere of the sun at the time of ...

    Text Solution

    |

  17. Heavy water is

    Text Solution

    |

  18. The nuclear reactor at Kaiga is a

    Text Solution

    |

  19. When a body moves in a circular path, no work is done by the force sin...

    Text Solution

    |

  20. A bullet moving with a speed of 100 ms^1 can just penetrate two planks...

    Text Solution

    |