Linear/angular Momentum / tripping / conservation

1. The problem statement, all variables and given/known data



An rectangular object(mass m) sliding on a horizontal plane (surface is frictionless), with a speed V, object height H.

then hits a rectangular obstacle with height h. V is large enough to cause tripping



2. Relevant equations



what is the relation between linear momentum / angular momentum / conservation of momentum





3. The attempt at a solution



is this what's happening; the object has a momentum of P=mV.

then an impulse I=t*F is applied to the object by the obstacle.

This impulse reduces the linear momentum to P'=m*V-F*x

---This m*V-Fx gives the angular momentum(with respect to the point of contact) causing the rotation?---





I am not sure if my thinking is correct, especially my last statement.



An alternative is; taking initial mV as an angular momentum with changing radius wrt the contact point??? ie not mentioning linear momentum at all?





Thanks in advance.