A 16 g mass is moving at 50 cm/s while a 4 g mass is moving in an opposite direction at 30 cm/s. They collide head on and stick together. Their velocity after collision is? Express answer in Sl units. *

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Special Relativity

The theory of special relativity discusses how space and time are related to objects traveling along a straight line at a constant speed. Simply stated, as an object reaches the speed of light, its mass becomes infinite and it is unable to move faster than light. This interstellar speed limit has been the topic of much debate in astronomy, and also in science fiction when people consider how to fly over large distances.