In an American football game, linebacker with a momentum of 121 kg m/s tackles
a quarterback who had a momentum of -80 kg m/s. After the tackle, the linebacker
has a momentum of 72 kg m/s. If momentum was conserved, what is the momentum
of the quarterback after the collision?.
-80 kg m/s
41 kg m/s
121 kg m/s
-31 kg m/s