biomechanics.txt

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Author:
jpowell22
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105486
Filename:
biomechanics.txt
Updated:
2011-09-30 19:01:40
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maureen
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lecture 3
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  1. What involves the use of tools of mechanics, the branch of physics that analyzes the action of forces, in the study of anatomical and functional aspects of living organisms?
    biomechanics
  2. What is statics?
    STILL; bodies at rest or in uniform motion
  3. What is dynamics?
    MOVING; bodies in motion or a body accelerating or decelerating
  4. Dynamics can be classified as what 2 things?
    kinematics, kinetics
  5. What is the geometry of motion?
    kinematics
  6. What is the study of forces (acting on movement)?
    kinetics
  7. Kinematics has 4 categories, what are they?
    • 1.displacement
    • 2.velocity
    • 3.acceleration
    • 4.deceleration
  8. What is displacement?
    distance traveled from point A to point B
  9. What is the speed? (displacement/time)
    velocity
  10. What is the rate of increase in speed?
    acceleration
  11. What is the rate in the decrease of speed?
    deceleration
  12. What is osteokinematics?
    movement of bones
  13. What is arthrokinematics?
    movements of joints
  14. Internal and external forces are part of what?
    kinetics
  15. What are some examples of external forces?
    gravity, friction, barometric pressure, wind and water resistance
  16. What are some examples of internal forces?
    muscles/soft tissues(swollen, etc..), friction (bone surface, synovial fluid)
  17. What 3 things are needed to have a vector quantities?
    • 1. a point of application
    • 2. an action line and direction
    • 3. a magnitude (intensity)
  18. What has both magnitude and direction?
    vector quantity
  19. What has magnitude only?
    scalar
  20. What is another term for intensity?
    magnitude
  21. What is another name for linear motion?
    translatory motion
  22. What type of motion has each point that moves through the same distance at the same time in parallel paths?
    linear (translatory) motion
  23. What is rectilinear motion?
    jumping up; moving or forming a straight line
  24. What kind of motion moves in a curved line?
    curvilinear
  25. What is another name for angular motion?
    rotary motion
  26. What is angular (rotary) motion?
    has an axis or point and everything else moves around the point
  27. What kind of motion is chaotic and has no pattern to it?
    general motion
  28. What doe linear kinematics of the human body involve?
    study of shape, form, pattern, and sequencing of linear movement through time
  29. What are 2 examples of linear kinematics?
    scalar, vector quantity
  30. What is a scalar quantity?
    magnitude only, can be represented by a certain point; has certain length, are, or number (drove 70 miles, weighs 165 lbs)
  31. What is a vector quantity?
    direction and magnitude
  32. Distance is what quantity?
    scalar (10ft, 20ft etc..)
  33. What type of quantity is displacement?
    vector (has a start/end point, change in position)
  34. Scalar/vector? Patient ambulated 12 feet.
    scalar
  35. Scalar/vector? Patient ambulated 12 fet from the bed to the door.
    vector
  36. What type of quantity is better/more descriptive?
    vector..use displacement instead of just distance
  37. What is speed?
    movement, how fast, less descriptive
  38. What is displacement/time, acceleration and deceleration?
    velocity
  39. Linear kinetics of the human body has to deal with what?
    Newtons laws
  40. What is newtons 1st law?
    law of inertia
  41. What law states a body will maintain a state of rest or constant velocity unless acted on by an external force that changes the state?
    1st law
  42. What is the property of an object that makes it resist both the initiation of motion and a change in motion?
    inertia
  43. What is inertia?
    what you have to overcome in order to make a movement happen
  44. What are some examples of inertia?
    grippy stuff on bottom of hospital socks (increased inertia makes it harder to move), whiplash
  45. The law of acceleration is which law?
    2nd law
  46. What does the 2nd law state?
    an object will only accelerate if a force acts on it
  47. Acceleration is inversely proportional to what?
    mass (the bigger something is the lower the acceleration; kick ball, bowling ball)
  48. When a force acts upon an object it is proportional to what?
    the acceleration
  49. Force is directly proportional to what?
    acceleration
  50. What is newtons 3rd law?
    law of reaction
  51. What does the law of reaction state?
    for every action, there is an equal and opposite reaction

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