Badminton Serve

Lauren Parzianello, April Spaulding, and Maria Szatkowski

Tracker Analysis Video:

Birdie Before Being Hit:
Position Graph:
 Once the birdie was let go out of Maria's hands, the velocity was constantly increasing with an acceleration of 9.8 m/s/s because it was only falling down due to gravity. The velocity of the birdie would be .1 m/s.

v= d/t   v= .3/3  v= .1 m/s
Velocity Graph:
  The velocity of the birdie was fairly constant, especially because of the size of the birdie and the short distance it traveled in this time frame.

Acceleration Graph:
The acceleration of the birdie (from when it left Maria's hand to when it touches the raquet) is minimal, corresponding with the minimal change in velocity.
Birdie After Being Hit:
Position Graph:
 The velocity is slowly decreasing after being hit. The velocity of the birdie is v= .167 m/s

v=d/t     v=4.0/24   v=.167 s/m
Velocity Graph:
 The velocity of the birdie is negative and significantly changes because of the combination of the forces of gravity, the oncoming air resistance, and the force of the swing of the raquet. The negative motion is displayed in the downward slant of the graph.

Acceleration Graph:
 There is significant negative acceleration in the birdie after it has been hit. As mentioned above, the forces of the raquet, air, and gravity cause the birdie to decelerate up to its peak, and then accelerate due to gravity on the way down.
Maria's Raquet:
Position Graph:
 Maria's raquet has an increasing velocity when hitting the birdie. its velocity is v=.291 m/s

v=d/t    v= 1.6/5.5= .291 m/s

Velocity Graph:
Maria's raquet's velocity is increasing when swinging to hit the ball, but then decreases after making contact with the birdie.
Acceleration Graph:
 The raquet has a positive acceleration until contact with birdie occurs. Once the birdie leaves the raquet, the velocity of the raquet decreases, causing a negative acceleration.
Steve Dickie,
Oct 28, 2009, 6:03 PM