$(1)$ Two ice skaters pushing off each other and moving apart at different speeds

$$

A football player tackling another football player and both falling to the ground motionless

A car slowing down due to friction with the roadThe rotation of an ice skater while changing from sitting to a standing spin

Select match

Completely inelastic collision conserving momentum but not energy

Conservation of angular momentum

External force acting on the system so that momentum does not appear to be conserved looking at one part of the whole

Conservation of momentum and energy

Elastic collision conserving momentum