4. Two masses m, = 5kg and m2 = 10kg have velocities V1 = 2 m/s in the +x direction %3D and v2 = 4 m/s in the +y direction. They collide and stick together. What is their final velocity after the collision?

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A: Note:  As per Bartleby Guidelines, only first question to be solved. Please upload second question…

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Q: What is total momentum?

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A: Question is talking about conditions in which Linear Momentum is Conserved:

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Q: Define elastic collisions.

A: