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Definition
| the application of the laws of mechanics to animate motion |
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| Reasons for studying Biomechanics? |
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Definition
-How do we generate and control movement?
-Making our movements better (i.e. equipment, rehab, footwear)
-Injury prevention |
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Definition
| Can be described completely by size (magnitude) (mass) |
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Definition
| requires knowledge of magnitude and direction to completely understand it effect (force) |
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Definition
| Adding component vectors together to form a single resultant |
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Definition
| breaking a resultant vector into vector components (i.e. baseball) |
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Definition
| relates size of the three sides to one another |
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theta 1 + theta 2 = ?
theta 1 and theta 2 are what types of angles? |
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Definition
addition = 90 degrees
the angles are complimentary angles |
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Term
speed involves ______
velocity involves ______ |
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Definition
speed involves DISTANCE
velocity involves DISPLACEMENT |
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| use inverse tangent to find |
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Definition
| unknown angles when you have known sides |
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| linear motion and example |
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Definition
| movement along a straight or curved path where all points on the body move the same distance in a given amount of time i.e. movements of a sprinter, center of gravity during gait, tennis racket |
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Definition
| motion about an axis; different points move through different distances; can be located within or outside of the body |
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| general motion is what type of motion? |
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Definition
| both linear and angular motion; i.e. kicking a football, gait |
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Definition
| descriptive characteristics of movement i.e. spatial and temporal perspective. position, velocity, acceleration data. linear, angular. |
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Definition
| concerned with the causes of motion, force (push or pull), torque (turning effect of a force) |
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Definition
| all points on body cover the same distance in the same amount of time. rectilinear (truly straight) or curvilinear (what we will mostly deal with) |
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Term
what kind of quantity is distance?
what kind of quantity is displacement? |
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Definition
distance: scalar quantity, length of path.
displacement: vector quanity, "as the crow flies" difference between start and finish regardless of path taken |
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| We can only increase SL b/c of lenth of legs so we must increase _____ ______ ? |
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Definition
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| First Central Difference Method, what is the formula and what is another name for it? |
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Definition
Allows us to match kinematic data based on positions of the segment endpoints from each frame within a time interval.
The endpoint problem and the formula is v(frame) = v(frame + 1) - v(frame-1) all divide by t (between the two frames) |
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| why do shorter duration sports use splits instead of average velocity? |
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Definition
| by decreasing the time over which we examine velocity and other kinematic information, we approach instantaneous estimates of performance |
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| what is a way to measure instantaneous velocity? |
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Definition
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Term
| when slope = 0, the derivative graph = ? |
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Definition
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| a point of inflection means the derivative graph has |
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Definition
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Definition
| rate of change of position with respect to time |
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| definition of acceleration |
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Definition
| rate of change of velocity with respect to time |
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| what is the difference between "quick" and "fast"? |
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Definition
| "quick" or "good acceleration" means a person's ability to change speed and/or direction. |
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| instantaneous acceleration can be defined as? |
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Definition
| the derivative of velocity with respect to time |
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Term
| what must you remember when drawing a graph (for the ends of the graph?) |
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Definition
| on the ends, tangent slope |
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