In which of the following scenarios is MOMENTUM conserved? A: Inelastic collisions
B: Elastic collisions
C: Explosions

Only A
Only B
Both A&C
Both A&B
A, B,C

Could someone me find the answer to this problem.

Arocket starts from rest and moves upward from the surface of the earth. for the first 10.0 s of its motion, the vertical acceleration of the rocket is given by ay = 12.80 m/s32t, where the +y-direction is upward. (a) what is the height of the rocket above the surface of the earth at t = 10.0 s? b) what is the speed of the rocket when it is 325 m above the surface of the earth?

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