I would like to have some help the following problem:

**If a 32 g arrow moving at 160km/h penetrates a block of wood suspended by a rope, what is the impulse is delivered to the block?**

The impulse= momentum(final)-momentum(initial).

We know that momentum(initial)= 0.32 kg* 44.44m/s=14,28 N.

But what is the momentum(final)??

I do not understand this concept well even after read the texbook. Can someone explain me what is going on ?

Thank you

B