Physics, 05.11.2020 19:10, smartie80

A football running back of mass 90 kg moving at 5 m/s (positive direction) is tackled head on by another player of mass 120 kg running -4 m/s. They stick together. What is their final combined speed and direction (negative or positive sign)?

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A football running back of mass 90 kg moving at 5 m/s (positive direction) is tackled head on by ano...