1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Physics Grade 12 Q's

  1. Nov 1, 2007 #1
    1. The problem statement, all variables and given/known data
    1. When a meteoroid collides with the moon, surface material at the impact site melts. Explain Why?

    2. A falling rock gains momentum as its speed increases. Does this observation contradict the law of conservation of momentum? Explain your answer.

    3. The attempt at a solution

    1. An object receiving an impulse from a smaller force has a final impulse larger then an object receiving an impulse from a larger force.

    2. Because of the extreme surface to surface energy transfer, thermal energy is created melting the surface at the impact site.
  2. jcsd
  3. Nov 5, 2007 #2
    How about re-phrasing the answer to 2 in terms of the rock and its momentum, making clear where your smaller and larger forces come into the picture?
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook