Lecture 4 Flashcards
What are tje 4 steps of movement analysis
Description
Observation
Evaluation
Instruction
What comes under description
Goal of movement
Use of biomechanical terms
What are the phases pf typical activity (Description)
Preparation
Execution
Follow through
What comes under Observation
Best viewing angle (sagittal, frontal or transverse)
Number of viewing angles
Distance
Number of repetitions
Equipment
Clothing and background
Location
What comes under Evaluation
Identifying errors
Evaluate errors
When you evaluate errors what do you look for
Cause
Impact
Safety
What comes under instruction
Clear communication
Learning time
What is Kinematics
What does it include
Study of the motion without considering what is causing the motion
Includes both spatial and temporal characteristics
What are the two preliminary conditions (questions)
What is moving
What is it moving in relation to
What comes under “What is moving”
Body - the object of analysis
System - the object of analysis that is made up of two or more bodies
Point - a way of representing a body that has no dimensions
Body refers to
The object of analysis
System refers to
The object of analysis that is made up of two or more bodies
Point refers to
A way of representing a body that has no dimensions
What comes under “What is it moving in relation to”
Frame of reference
Origin
Direction
Frame of reference refers to
The perspective from which movement is described
Direction refers to it being
Positive or negative
How do you establish a frame of reference
Locate an origin (fixed and memorable)
Define axis
Specify a positive and negative direction
Position represents
An objects location in the frame of reference
The objects physical location in space
What are the two quantities that we need to define
Scalar
Vector
What is Scalar
Magnitude only
Speed, volume, mass, time etc
What is Vector
Magnitude and a spatial direction
Velocity, force, displacement etc
What is displacement
Straight line from two points
This is the shortest line
Also is a vector quantity
A—————————-D
What is distance
Actual path of line
A -> B
B -> C
C -> D
B D A C
Alsi is a scalar quantity
What is the rate of change
What is the equation for it
What quantity
How quickly a value is increasing or decreasing with time
Change in quantity
________________
Change in time
Can be described as scalar or vector
Speed or velocity
What is speed
What is the equation
What is it measured as
What are the typical units of speed
How fast a body is moving with no regard to direction
Distance
__________
Change in time
Measured as the rate of change of DISTANCE
m/s
mile/hr
What is velocity
What is the equation
What is it measured as
What are the typical units of velocity
How fast a body is moving in a particular direction
Change in position
___________________
Change in time
Measured as the time rate of change in POSITION
m/s
ft/s
If we run 1 mile and we finish back from where we started, what will be the displacement
What will be the distance
0m
1600m
What is acceleration
What is the equation
What is it measured as
What quantity
What are the typical units of
Change in VELOCITY over time
Change in velocity
_______________
Change in time
Measure of how something is speeding up or slowing down
Vector quantity
m/s m
_____ or _______
s s^2
