Card Set Information
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?
What is statics?
STILL; bodies at rest or in uniform motion
What is dynamics?
MOVING; bodies in motion or a body accelerating or decelerating
Dynamics can be classified as what 2 things?
What is the geometry of motion?
What is the study of forces (acting on movement)?
Kinematics has 4 categories, what are they?
What is displacement?
distance traveled from point A to point B
What is the speed? (displacement/time)
What is the rate of increase in speed?
What is the rate in the decrease of speed?
What is osteokinematics?
movement of bones
What is arthrokinematics?
movements of joints
Internal and external forces are part of what?
What are some examples of external forces?
gravity, friction, barometric pressure, wind and water resistance
What are some examples of internal forces?
muscles/soft tissues(swollen, etc..), friction (bone surface, synovial fluid)
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)
What has both magnitude and direction?
What has magnitude only?
What is another term for intensity?
What is another name for linear motion?
What type of motion has each point that moves through the same distance at the same time in parallel paths?
linear (translatory) motion
What is rectilinear motion?
jumping up; moving or forming a straight line
What kind of motion moves in a curved line?
What is another name for angular motion?
What is angular (rotary) motion?
has an axis or point and everything else moves around the point
What kind of motion is chaotic and has no pattern to it?
What doe linear kinematics of the human body involve?
study of shape, form, pattern, and sequencing of linear movement through time
What are 2 examples of linear kinematics?
scalar, vector quantity
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)
What is a vector quantity?
direction and magnitude
Distance is what quantity?
scalar (10ft, 20ft etc..)
What type of quantity is displacement?
vector (has a start/end point, change in position)
Scalar/vector? Patient ambulated 12 feet.
Scalar/vector? Patient ambulated 12 fet from the bed to the door.
What type of quantity is better/more descriptive?
vector..use displacement instead of just distance
What is speed?
movement, how fast, less descriptive
What is displacement/time, acceleration and deceleration?
Linear kinetics of the human body has to deal with what?
What is newtons 1st law?
law of inertia
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?
What is the property of an object that makes it resist both the initiation of motion and a change in motion?
What is inertia?
what you have to overcome in order to make a movement happen
What are some examples of inertia?
grippy stuff on bottom of hospital socks (increased inertia makes it harder to move), whiplash
The law of acceleration is which law?
What does the 2nd law state?
an object will only accelerate if a force acts on it
Acceleration is inversely proportional to what?
mass (the bigger something is the lower the acceleration; kick ball, bowling ball)
When a force acts upon an object it is proportional to what?
Force is directly proportional to what?
What is newtons 3rd law?
law of reaction
What does the law of reaction state?
for every action, there is an equal and opposite reaction