# Volleyball Impulse and momentum problem

#### bchat112000

can someone explain to me how to start on this problem

A volleyball is spiked so that its incoming velocity of +4.1 m/s is changed to an outgoing velocity of -18 m/s. The mass of the volleyball is 0.44 kg. What impulse does the player apply to the ball?

Related Advanced Physics Homework News on Phys.org

#### jfizzix

Gold Member
The impulse $J$ is defined as
$\vec{J}\equiv \int_{t_0}^{t_f}dt' \vec{F}_{net} (t')$

From Newton's second law, the impulse is also equal to the change of momentum.

$\vec{J}=\vec{p}_f -\vec{p}_i =m\vec{v}_f -m\vec{v}_i$

If we know $m$,$\vec{v}_f$, and $\vec{v}_i$, we have all the information needed to figure out the impulse.

"Volleyball Impulse and momentum problem"

### Physics Forums Values

We Value Quality
• Topics based on mainstream science
• Proper English grammar and spelling
We Value Civility
• Positive and compassionate attitudes
• Patience while debating
We Value Productivity
• Disciplined to remain on-topic
• Recognition of own weaknesses
• Solo and co-op problem solving