Week 5 - Kinetic chain

Question 1

You suspect Shalin may have partially
dislocated her ACJ. What ligaments could be
torn if that was the case?

A. Coracoacromial and costovertebral
B. Acromioclavicular and sternoclavicular
C. Coracoacromial and acromioclavicular
D. Acromioclavicular and costoclavicular
E. Acromioclavicular and trapezoid ligament

Answer 1

E

Question 2

Angular velocity equation

Answer 2

angular displacement (°) / time (sec)

Question 3

Momentum equation

Answer 3

Mass * velocity

Question 4

How does coordination help angular velocity?

Answer 4

Using all portions of the kinetic chain in conjunction allows for peak angular velocity. If we use the momentum from each segment (upper arm, forearm, hand) we can throw further. If we transfer that kinetic energy from each segment to the next at the angular velocity peak, we are able to perform a perfect sequence and minimal velocity is lost.