Let's say you have a 1.0kg mass at rest, struck by a 2.0kg mass moving at -2.0m/s. They collide and stick together, thus combining their mass to a singular 3.0kg. What is the velocity of the
combined mass and what type of collision is this?

no. dot product   =0 when vecs at right angles

mass and volume are the answers you are looking for

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