Physics Grade 12 Q's: Impulse & Momentum

[andrei.suba]

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.

 

[catkin]

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?