Home
Class 11
PHYSICS
A bullet is fired from surface of earth ...

A bullet is fired from surface of earth with a velocity of u m/s at an angle` theta` with the x-axis. Simultaneously a similar bullet is fired from a certain plant with velocity `u^'` m/s at the same angle with the direction of x-axis. The trajectories in the two cases are identical. If g and `g^'` are accelerations due to gravity on the curth's surface and planet's surface respectively, then

A

`u/u^'=g/g^'`

B

`u/u^'=g^2/g^'2`

C

`u^2/u^('2)=g^'/g`

D

`u^2/u^('2)=g/g^'`

Text Solution

Verified by Experts

Promotional Banner

Topper's Solved these Questions

  • MEASUREMENTS

    TARGET PUBLICATION|Exercise EVALUATION TEST|17 Videos

  • OPTICS

    TARGET PUBLICATION|Exercise EXERCISE|447 Videos

Similar Questions

Explore conceptually related problems

A projectile is fired from the surface of the earth with a velocity of 7 ms^-1 and angle theta with the horizontal. Another projectile fired from another planet with a velocity of 2.5 ms^-1 at the same angle follows a trajectory which is identical with the trajectory of the projectile fired from the earth. The value of the acceleration due to gravity on the planet is (in ms^-1 (given =9,8 ms^-2 )

A shell is fired from canon with a velocity of 200 m/s at an angle of 30^@ with the horizontal The horizontal range attained by it is [g= 10 m s^-2]

A bomb is fired from a cannon with a velocity of 1000 m/s making an angle of 30^@ with the horizontal. What is the time taken by the bomb to reach the highest point?

A body is projected vertically upwards with a velocity of 10 ms^-1 and another body is projected simultaneously from the same point with a velocity of 20 m s^-1 at an angle of pi/6 with the horizontal. The distance between the two bodies after one second from the time of projection is (Acceleration due to gravity is 10 ms^-2 )

A body is thrown from the surface of the earth with velocity u m/s. The maximum height in metre above the surface of the earth upto which it will reac is (where, R = radish of earth, g=acceleration due to gravity)

A body of mass m rises to a height h=R//5 from the earth's surface where R is earth's radius. If g is acceleration due to gravity at the earth's surface, the increase in potential energy is

A bullet fired from gun with a velocity 30 m/s at an angle of 60^(@) with horizontal direction. At the highest point of its path, the bullet explodes into two parts with masses in the ratio 1 : 3. The lighter mass comes to rest immediately. Then the speed of the heavier mass is

A satellite of mass m is orbiting the earth (of radius R ) at a height h from its surface. The total energy of the satellite in terms of g_(0) , the value of acceleration due to gravity at the earth's surface,

A bullet of mass 10 g is fired with a velocity of 100 m/s from a rifle of mass 2.5 kg, the recoil velocity of the rifle is

Calculate the value of the universal gravitational constant from the given data. Mass of the Earth = 6xx10^24 kg, Radius of the Earth = 6400 km and the acceleration due to gravity on the surface = 9.8 m//s^2

TARGET PUBLICATION-Motion in a plane-Exercise
  1. A coin is placed on a rotating tur table rolated with angular speed om...

    Text Solution

    |

  2. A particle has initial velocity 4 hat i + 3 hat j and an accelaration ...

    Text Solution

    |

  3. A boat crosses a lake and returns in time T0, at a speed V. On a rough...

    Text Solution

    |

  4. A bullet is fired from surface of earth with a velocity of u m/s at an...

    Text Solution

    |

  5. A man throws balls with same speed vertically upwards one after the ot...

    Text Solution

    |

  6. A body is projected with velocity v1from the point P as shown in the f...

    Text Solution

    |

  7. A particle of mass 8 kg is initially at rest. A force acts on it whose...

    Text Solution

    |

  8. Two trains 120 m and 100 m in length are running in opposite direction...

    Text Solution

    |

  9. A body starting from rest is accelerated uniformly for 15 s. If x1, x...

    Text Solution

    |

  10. Two particles are projected from the same point with the same speed, a...

    Text Solution

    |

  11. A body of mass m starts moving from a position of rest with a constant...

    Text Solution

    |

  12. A child travelling in a minibus accidentally drops a bottle out of the...

    Text Solution

    |

  13. A particle is projected at pi/4 to the horizontal with a kinetic energ...

    Text Solution

    |

  14. A cyclist starts from the centre O of a circular park of radius two ki...

    Text Solution

    |

  15. A projectile has initially the same horizontal velocity as it would ac...

    Text Solution

    |

  16. In a car race, car A takes a time of t s less than car B at the finis...

    Text Solution

    |

  17. A body starting from rest, accelerates at a constant rate a m/s^2 for ...

    Text Solution

    |

  18. The speed of a projectile when it is at its greatest height is sqrt(2/...

    Text Solution

    |

  19. A particle of mass 2 kg is revolved in a horizontal circle of radius l...

    Text Solution

    |

  20. A car of mass 840 kg moves on a circular path with constant speed of 1...

    Text Solution

    |