Nicole+Obermaier

Rambunctious Roll

//The picture is showing a girl falling towards to ground for a low volleyball. When falling to the ground she will need to pass the ball and stand up quickly to continue on playing. After landing on the floor, she will need to roll over her shoulder and spring back up for the next play.// //The volleyball shoulder roll is an extremely important skill in volleyball. You need to make sure you are in a balanced position, a great force is applied, and momentum is carried through in order to complete the roll quickly. In the sport of volleyball, agility is very important. Being agile allows different moves to occur.// media type="file" key="M4H00579.MP4" align="center" width="300" height="300" __ ** Balance: ** __ Balance is an even distribution of weight enabling someone to remain upright and steady. Being in a balanced position is extremely important. Becoming balanced will allow no forces to effect your movement and cause you to perform with excellence. Balancing is the key to success and allows force to be exerted and to be followed by momentum. __ ** Force: ** __ Force is the strength or energy as an attribute of physical action or movement. When digging for a ball and completing a shoulder roll will require a great amount of force to be applied. The amount of force exerted will all depend on the speed of the ball and the top spin to ball has. If the ball is coming fast and with a top spin that will become low to the ground, and greater amount of force needs to be exerted on your body to start the should roll. If the ball is lightly hit over the net but low to the ground, a roll will still be required but the force would be much smaller. __ ** Momentum: ** __ Momentum is the quantity of motion of a moving body, measured as a product of its mass and velocity. When dealing with the force, the momentum follows about the same requirements. If the force is great then the momentum needs to follow. When a large force is being applied to the body diving for the ball, momentum will be required to allow to body do perform a complete shoulder roll in a timely fashion. Momentum is key to completing the roll. If there is not enough momentum then the player could be seriously injured and receive other consequences. Overall, balance, force , and momentum really help explain a volleyball shoulder roll and how they all relate. Starting with that perfect balanced position, adding a force to start the roll, and begin the momentum to bring to roll to its highest peak and finish the shoulder roll without a problem!




 * __Physics Concepts:__** Balance, Force, Momentum

__**References**__ http://www.east-buc.k12.ia.us/02_03/ce/tt/dis.htm http://www.volleyballadvisors.com/volleyball-skills-digging.html http://www.volleyball-training-ground.com/volleyball-defense.html Casey Griffith: member of the volleyball team; teammate