The total momentum of a system before an event must be equal to the total momentum of the system after the event, according to the law of conservation of momentum.
In this scenario:
- The momentum of the kick returner when he catches the ball is 0 kg-m/s.
- The momentum of the diving player is 130 kg-m/s.
To find the total momentum before the collision, we can add the momenta of both players:
\[ \text{Total momentum before} = \text{momentum of returner} + \text{momentum of diving player} = 0 \text{ kg-m/s} + 130 \text{ kg-m/s} = 130 \text{ kg-m/s} \]
Since momentum is conserved, the total momentum just after the collision will also be:
\[ \text{Total momentum after} = 130 \text{ kg-m/s} \]
Thus, the magnitude of the total momentum just after the collision will be 130 kg-m/s.
The correct answer is: • 130 kg-m/s