Basic Biomechanics
An object in motion stays in motion unless acted upon by an external force.
Demonstrate anatomical position.
Standing, palms forward
Is the tibia part of the axial or appendicular skeleton?
appendicular
What is the difference between displacement and distance?
Displacement: change in position
Distance: total amount traveled
What is known as "center-seeking" force?
Centripetal force
Torque is the angular analogue of what?
Which vertebrae are the largest?
Lumbar
What attaches muscle to bone?
Tendon
In the human body, most of the lever systems formed by muscles pulling on bones are what class?
If a diver goes from a full layout position to a tuck position, what will happen to her angular velocity?
Increase
What does qualitative mean?
Pertains to quality, non-numerical
What type of joint is the shoulder?
Which knee ligament is most likely to be damaged from a lateral blow?
MCL
At what angle will the elbow (biceps) be able to produce the most force?
90 degrees
When knee flexion is increased, what happens to the moment of inertia of the leg about the hip?
Decreased
What factors impact the amount of force it takes to overcome friction?
Coefficient of friction, mass of the object
Which of the vertebral regions has the best range of motion?
Cervical
Non-contact, plant + pivot
The ability to control equilibrium defines what?
Balance
If angular acceleration is constant, then angular velocity must be
Increasing or decreasing
What is Newton's third law?
For every action there is an equal and opposite reation
Name the four rotator cuff muscles.
Posterior pelvic tilt positions the acetabulum in a more favorable position for which of the following hip movements?
Hip Flexion
What is the difference between stability and balance?
Stability: ability to resist changes in equilibrium
Balance: ability to control equilibrium
What happens to velocity when the radius of gyration gets smaller?
Increases