Physics Grade 12 Q's: Impulse & Momentum

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    Grade 12 Physics
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SUMMARY

The discussion focuses on two physics questions related to impulse and momentum. The first question addresses the melting of surface material on the moon upon meteoroid impact, attributed to the extreme energy transfer resulting in thermal energy. The second question examines the increase in momentum of a falling rock, clarifying that this does not contradict the law of conservation of momentum, as the forces acting on the rock and the system must be considered. The formula F=m((v-v')/t) is referenced to explain impulse in relation to force and time.

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  • Understanding of impulse and momentum concepts
  • Familiarity with Newton's laws of motion
  • Basic knowledge of energy transfer and thermal energy
  • Ability to apply mathematical formulas in physics
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Students in Grade 12 physics, educators teaching mechanics, and anyone interested in understanding the principles of impulse and momentum in real-world applications.

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Homework Statement


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.

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.
F=m((v-v')/t)

2. Because of the extreme surface to surface energy transfer, thermal energy is created melting the surface at the impact site.
 
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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?
 

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