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Gravitation Test - 49

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Gravitation Test - 49
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Weekly Quiz Competition
  • Question 1
    4 / -1
    Escape velocity on a planet is ve.If radius of the planet remains same and mass becomes 4 times, the escape velocity becomes
    Solution

  • Question 2
    4 / -1
    The escape velocity of a body from earth\'s surface is ve. The escape velocity of the same body from a height equal to 7R from earth\'s surface will be
    Solution

  • Question 3
    4 / -1
    How much energy will be necessary for making a body of 500 kg escape from the earth ?
    [g = 9.8 m/s2, radius of earth = 6.4 × 106 m]
    Solution

  • Question 4
    4 / -1
    An artificial satellite is revolving round the earth in a circular orbit. Its velocity is half the escape velocity. Its height from earth\'s surface is
    Solution

  • Question 5
    4 / -1
    There are two planets. The ratio of radius of the two planets is K but ratio of acceleration due to gravity of both planets is g. What will be the ratio of their escape velocity ?
    Solution

  • Question 6
    4 / -1
    The angular velocity of rotation of star (of mass M and radius R) at which the matter start to escape from its equator will be
    Solution

  • Question 7
    4 / -1
    Four particles each of mass M, are located at the vertices of a square with side L. The gravitational potential due to this at the centre of the square is
    Solution

  • Question 8
    4 / -1
    The ratio of the radii of planets A and B is k1 and ratio of acceleration due to gravity on them is k2. The ratio of escape velocities from them will be
  • Question 9
    4 / -1
    A mass of 6 × 1024 kg is to be compressed in a sphere in such a way that the escape velocity from the sphere is 3 × 108 m/s. Radius of the sphere should be
    (G = 6.67 × 10–11 N – m2/kg2)
    Solution

  • Question 10
    4 / -1
    The radius of a planet is 1/4 of earth\'s radius and its acceleration due to gravity is double that of earth\'s acceleration due to gravity. How many times will the escape velocity at the planet\'s surface be as compared to its value on earth\'s surface ?
    Solution

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