Astro set 2

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  1. The animation shows a collapsing cloud of interstellar gas. As the cloud collapses, the force of gravity drawing the cloud inward __________ because __________.
    • (Blank 1) gradually becomes stronger
    • (Blank 2) the strength of gravity follows an inverse square law with distance
  2. As the cloud shrinks in size, its rate of rotation __________ because __________.
    • (Blank 1) speeds up
    • (Blank 2) its total angular momentum is conserved
  3. Suppose your car hits a bug while driving on the expressway.  Which of the following is true?
    All true
  4. Newton's Version of Kepler's 3rd Law is most useful for....
    Finding the mass of a large object being orbitted by a smaller one.
  5. Which one of the following describes an object that is NOT accelerating?
    A roller coaster on a straight, flat track moving at 10 miles per hour.
  6. When a spinning ice skater pulls in his arms, he spins faster because _________.
    his angular momentum must be conserved, so reducing his radius must increase his speed of rotation
Card Set:
Astro set 2
2015-03-26 01:28:52
Astro set
exam 2
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