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39 Cards in this Set
- Front
- Back
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What is biomechanics? |
Application of mechanics to biology
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What is mechanics? |
Area of study within physics concerned with forces and motion
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What is biomechanics divided into?
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Dynamics and statics
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What is dynamics?
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Study of moving objects or systems
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What are the two parts to dynamics?
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Kinematics and Kinetics
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What is kinematics?
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Study of movement with respect to space and time only
quantifying technique effects of movement |
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What are principles of kinematics?
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Displacement
Velocity Acceleration |
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What is kinetics?
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Study of movement with respect to forces
cause of movement |
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What are forces?
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A push or pull
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What are the principles of kinetics?
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Gravity
Friction Torque Momentum |
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What are the two types of motion?
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Linear and Angular
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What is linear motion also know as?
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Translation
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What are the two different kinds of linear motion?
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Curvilinear
Rectilinear |
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What is linear motion defined as?
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Every part of the object is moving uniformly as a unit in the same direction at the same speed without rotation and without extraneous movements
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What direction is rectilinear movement?
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Straight
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What direction is curvilinear movement?
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At a curve...duh
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What is angular motion?
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Rotational movement around an axis
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What is axis of rotation?
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Imaginary line perpendicular to the plane of movement in which the movement occurs
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What is general motion?
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When linear and angular movements are both occurring
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What are two methods of biomechanical observation |
Qualitative |
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What does qualitative analysis require a knowledge of? |
The purpose of the movement The specific movement kinematics the individual performing the movement biochmecanical principles |
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Ultimately what are we observing or quantifying when it comes to a quanitative analysis? |
Changes in position of the various joints of the body |
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What does quantifying changes in body position allow us to do? |
It allows us to quantify the velocity and acceleration of the whole body and specific joints of the body |
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What 6 things does kinematic measure? |
Position Time Displacement Velocity Acceleration Jerk or Jolt |
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What is a vector defined as? |
a measurement that has a magnitude and direction |
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What is displacement defined as? |
Change in position |
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What is the equation of displacement? |
Finish position - Start position |
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What is the equation for change in velocity? |
V= Displacment/Change in time |
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What is the equation for acceleration? |
A= Final(V) - Initial(V)/ Final(T) - Initial(T) |
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What is jerk defined as? |
Rate of change in acceleration? |
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What is the equation for Jerk? |
J= Final(A) - Initial(A)/Final(T) - Initial(T) |
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How do you solve velocity of walking? |
Stride length x Stride frequency
Step length x Cadence (Steps/min) |
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How do you convert an angular measurement in degrees to radians? |
(Degrees) x Pie/180 |
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How do you convert radians to degrees |
(Radians) x 180/pie |
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What is the equation for rate of change in angular position? |
W(Omega)= Final(AP) - Initial(AP)/Final(T) - Initial(T) |
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What is the equation for rate of change in angular velocity? |
A= W(Final) - W(Initial)/Time |
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What is a moving axis of rotation?
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Determining exact angular measures in moving body segments is complicated by the movement of the instantaneous joint center
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What does scalar measure?
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Measures only magnitude
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What does scalar measure?
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Measures only magnitude
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