A 71 kg football player moving 5.5 m/s tackles and collides with a stationary 140 kg football player. What speed will the football players have the moment after impact?
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Answer:
mv=m2v2
71*5.5=140*x m/s
x m/s = 71*5.5/140 = 2.78 m/s is the speed at moment after impact
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