Momentum Change and Impulse in Colliding Balls

[soupastupid]

Homework Statement

There are two balls traveling and they collide. How do there momentum change.
What is the impulse done to ball B by ball A.

Homework Equations

delta momentum = 0
impulse = ?

The Attempt at a Solution

the first part

i think its C

becuz A is moving up and B is moving down
the horizontal movement didnt change

and so the impulse from ball A to ball B
must be pointing DOWN right?

and the answer must be B ??

right?

 

[tiny-tim]

Hi soupastupid!

the first part

i think its C

becuz A is moving up and B is moving down
the horizontal movement didnt change

and so the impulse from ball A to ball B
must be pointing DOWN right?

and the answer must be B ??

right?

Right!

(btw, impulse and change-of-momentum are the same thing )