Home
Class 9
PHYSICS
Identical packets are dropped from two a...

Identical packets are dropped from two areoplanes, one above the equator and the other above the north poole, both at height h. Assuming all condition are identical, will those packets take same time to reach the surface of earth. Justify your answer.

Text Solution

Verified by Experts

It is known that value of acceleration due to gravity (g) at poles is higer than its value at equator i.e.,`g_(p)gtg_(e)`. Therefore, from given height, the packet dropped above the north pole will reach the earth eariler than the packet dropped above the equator.
Promotional Banner

Topper's Solved these Questions

Similar Questions

Explore conceptually related problems

Assuming earth to be spherical, at what height above the north pole, value of g is same as that on earth's surface at equator?

Assertion: A balloon ascends from the surface of earth with constant speed. When it was at a height 50 m above the ground, a packet is dropped from it. To an observer on the balloon, the displacement of the packet, from the moment it is dropped to the moment it reaches the surface of earth, is 50 m Reason: Displacement (vector) depends upon the reference frame used to measure it.

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.

Two identical loops , one of copper and the other of aluminium , are rotated with the same angular speed in the magnetic field . Compare (i) the induced emf and (ii) the current produced in the two coils . Justify your answer .

A small body of super dense material, whose mass is half the mass of the earth (but whose size is very small compared to the size of the earth), starts from rest at a height H above the earth’s surface, and reaches the earth’s surface in time t. Calculate time t assuming that H is very small compared to the radius of the earth. Acceleration due to gravity near the surface of the earth is g.

a. Mark the follllowing statements as true offalse. i. A ball thrown vertically up takes moretime to go up than to come down. ii. If a ball starts fallig from the position of rest, then it travels a distance of 25 m during the third secons of tis fall. iii. A packet dropped from a rising balloon ferst moves upwards and then moves sownward as observed by a stationary observer on the ground. iv. In the absence of air resistance, all bodies fall on the surface of earth at the same rate. b. Fill in the blanks. i. When a body is thrown vertically upwards, at the highest point.........................(both belocity and accelenation are zero//only velocity is zero//ony acceleration is zero). ii. If air drag is not neglected, then which is greater: time of ascent or time of descent? iiii. A body is projected upward. Up to the maximum height time taken will be greater to travel...................... (first half//second half).

A cylindrical tank of height H is completely filled with water. On its vertical side there are two tiny holes, one above the middle at a height h_1 and the other below the middle at a depth h_2 If the jets of water from the holes meet at the same point at the horizontal plane through the bottom of the tank then the ratio h_1//h_2 is :

A packet is dropped from a helicopter, which is ascending at a rate of 16m/s , when it is at a height of 14.4m above the ground. (i) How much time it will take the packet to reach the ground? (ii) With what velocity it will hit the ground?

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)-

PRADEEP-GRAVITATION-Short answer
  1. On the earth, a stone is thrown from a height in a direction parallel ...

    Text Solution

    |

  2. Suppose gravity of earth suddenly become zero, then in which direction...

    Text Solution

    |

  3. Identical packets are dropped from two areoplanes, one above the equat...

    Text Solution

    |

  4. The weight of any person on the moon is about 1//6 times that on the ...

    Text Solution

    |

  5. Calculate the average density of earth in terms of g, G and R.

    Text Solution

    |

  6. The Earth is acted upon by the gravitational force of attraction due t...

    Text Solution

    |

  7. What is inverse square rule ?

    Text Solution

    |

  8. Name two application of Newton's law of gravitation.

    Text Solution

    |

  9. Why don't two object move towards each other due to gravitational pull...

    Text Solution

    |

  10. Which of kepler's laws led N ewt on to inverse square rule for gravita...

    Text Solution

    |

  11. In free fall, will heavier objects have more acceleration due to gravi...

    Text Solution

    |

  12. Can a body have mass but no weight ?

    Text Solution

    |

  13. Can a body have weight but no mass?

    Text Solution

    |

  14. On what factors does the weight of a body depend ?

    Text Solution

    |

  15. How are gravitation and gravity realated?

    Text Solution

    |

  16. What is the relation between g and G ?

    Text Solution

    |

  17. Can you calculate mass of earth from Newton's law of gravitational?

    Text Solution

    |

  18. Can you calculate density of earth from Newton's law of gravitation?

    Text Solution

    |

  19. A body weighs 10 kg on the surface of earth. What would be its mass an...

    Text Solution

    |

  20. A body weighs more at poles than at the equator of earth. Why ?

    Text Solution

    |