Calculating Impulse of a Bouncing Steel Ball | Momentum and Impulse Homework

[BikeSmoth]

Homework Statement

A steel ball with mass 0.347 kg falls onto a hard floor and bounces. Its speed just before hitting the floor is 23.6 m/s and its speed just after bouncing is 12.7 m/s. (a) What is the magnitude of the impulse of the ball?

Homework Equations

J=pf-pi

The Attempt at a Solution

J=.347kg(12.7m/s)-.347kg(-23.6m/s)
J=12.6kg*m/s

 

[Fightfish]

Please take note of the direction of the momenta that you are considering.

 

[BikeSmoth]

Would anybody check this new answer?

 

[Fightfish]

Looks correct to me :)