Momentum of rubber bullet problem

[shehri]

Dear friends,

If a bear's attacked by a:

1) Rubber bullet.

2) a lead bullet.

Which'll be more effective in order to knock the bear down.I want to know how it's related to momentum phenomenon?I do know that lead bullet'll hit the bear down.Plz. reply in terms of momentum.Thanks.

 

[Defennder]

Think about whether the type of collision caused by the impact of the bullet on the bear.