Hey guys, first post !

A few Q's on momentum:

When a rock is falling down, it gains velocity due to Fg. Does this contradict the law of momentum ?

When your increase your kinetic energy by a factor of 2, then your momentum increases/decreases by a factor of ?

A rubber bullet R and a metal bullet M of equal mass strike a target T, R bounces off, M penetrates, which has a greater impluse?

Give an example of a collision in which the momentum a of system is not conserved and explain why in this case it was not.

 

Thanks in advance!

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