Gravity and planetary orbits: Newton, Kepler and satellites

1. 1According to Aristotle an object with no forces in it will

   1. Amove faster and faster
   2. Bstop moving eventually
   3. Calways the same
2. 2According to Galileo, the acceleration of a freely falling object due to gravity is ______ the larger the mass of the object

   1. Alarger
   2. Bsmaller
   3. Calways the same
3. 3According to Aristotle, which of the following would be an example of violent motion

   1. Aan apple falling from a tree
   2. Ba person pushing a car along the street
   3. Ca flame rising towards the heavens
   4. Da barrel rolling down a ramp
4. 4Newton Concluded that some force had to act on the moon because

   1. Aa force is needed to keep the moon in motion
   2. Ba force is needed to pull the moon outward
   3. Ca force is needed to pull the moon away from straight line motion
5. 5When two objects of unequal mass orbit each other, the center of mass is

   1. Aat the center of the more massive object
   2. Bas the center of the least massive object
   3. Calways closer to the more massive of the two objects
   4. Dalways closer to the less massive of the two objects
6. 6Gravity obeys the inverse square law. This statement implies that the gravitational force of one body on another will be ______ apart

   1. Anine times stronger at 2 meters than at 6 meters
   2. Bsix times weaker at 2 meters than at 6 meters
   3. Ctwo times stronger at 2 meters than at 6 meters
7. 7Perigee is

   1. Athe point in the moon's orbit when the moon is farthest from earth
   2. Bthe point in a planet's orbit when the planet is farthest from the sun
   3. Cthe point in an object's orbit around Earth, when the object is closest to Earth
   4. Dthe point in a planet's orbit when the planet is closest to the sun
8. 8A comet near the sun whose orbit is ___ would never be near the sun again

   1. Aelliptical
   2. Bcircular
   3. Chyperbolic
   4. Dapogee
9. 9Newtonian physics tells us that Kepler's second law

   1. Ais a result of the conservation if angular momentum
   2. Bis a result of the conservation of energy
   3. Cis a result in the conservation of mass
   4. Dis a consequence of the inverse square law
10. 10The circular velocity of a satellite orbiting Earth is given by vc= square root of GM/r. In this equation

    1. AM represents the mass of the satellite, and r is its radius
    2. BM represents the mass of Earth and r is the radius of Earth
    3. CM represents the mass of Earth and r the radius of the satellite's orbit

11. 11The diagram below illustrates the orbit of a satellite around Earth. Which letter indicates the location if perigee?

    1. AA
    2. BB
    3. CC
    4. DD
    5. EPerigee is the time to complete an orbit
12. 12A(n) _______ orbit is one where the orbiting object is always above the same location on Earth's surface

    1. Aelliptical
    2. Bgeosynchronous
    3. Cclosed
    4. Dhyperbolic
    5. Eparabolic
13. 13The apogee of a(n)__ orbit does not exist

    1. Aelliptical
    2. Bclosed
    3. Cparabolic
    4. Dgeosynchronous

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Quiz am Ohne Titel, erstellt von anqualls am 02/12/2014.

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