Abnormal motions of volleyball ball

[armin11]

Why while playing volleyball after the ball passes the net it shows some abnormal motions?

 

[berkeman]

Why while playing volleyball after the ball passes the net it shows some abnormal motions?

It's similar to a "knuckle ball" in baseball. The volleyball has some features on it -- it's not perfectly round. So if it has little or no spin, the features will cause the ball to move a bit side-to-side. That's why on serves and spikes, you try to hit the ball so it has no spin.

You especially see this effect in outdoor beach volleyball, when serving or spiking into the wind. It makes it very difficult to handle the ball with your bump

 

[armin11]

Thanks,but if you could say it in more scientific language it'll be very good,I'm an aerospace enginner and curious about this!

 

[berkeman]

Why while playing volleyball after the ball passes the net it shows some abnormal motions?

Thanks,but if you could say it in more scientific language it'll be very good,I'm an aerospace enginner and curious about this!

It's starting to sound like homework. Why don't you try phrasing it in aerodynamic language for us? You could look up knuckleball on wikipedia.org to get you started...