P1- Levers and technology Flashcards
what is the effort?
what is the fulcrum?
what is the load?
Fulcrum: Fixed point of rotation about which the lever moves.
Load: The resistance or weight to be moved. The weight of a human body part to be moved is the load.
The force being applied that causes the lever to move. The agonist muscle in the human body.
what is the load arm?
what is the effort arm?
Load Arm – The perpendicular distance from the fulcrum to the load.
Effort Arm – The perpendicular distance from the fulcrum to the effort.
How do we know the middle lever?
FLE
123
the letter that goes with the number is in the middle
which levers have mechanical adv/ dis adv?
1st and 2nd have advantage.
3 had disadvantage
what is limb kinematics?
what can we measure with it?
bennefits?
Limb Kinematics – The study of motion, limbs & movement.
movement efficiency, velocity, joint angles can all be assessed.
so we can improve technique
reduce chance of injury
improve posture
improve injury rehab
what are force plates?
what can we measure with them?
evaluation?
Rectangular Metal Plate, often used in combination with video/motion analysis.
Uses load cells/strain gauges to measure force.
Force-Time Acceleration-Time Velocity-Time Displacement-Time Force-Displacement Impulse
to analyse gait/walking/running to analyse posture To measure/improve balance For rehabilitation from injuries To measure force/power/acceleration to optimise angle of take-off Prevention of injury
Positive Injury prevention Rehabilitation Large amount of data for analysis Immediately available/accurate/reliable
Negative
Not available to most
Must be maintained/calibrated
Requires specialist training to interpret data
what are wind tunnels?
benefits and cons?
Wind tunnels used to simulate air resistance.
Positives
Improve technique (e.g - positioning on bike/ skis/ in car)
Test equipment design (e.g - bike frames/ helmets)
Negative
Accessibility
Cost
Requires specialist training to use/ interpret data
