Movement analysis (P1) Flashcards
What movement is produced in first class levers?
Extension at the elbow
What movement is produced at second class levers?
Plantarflexion at the ankle
What movement is produced at third class levers?
Flexion of the elbow
Extension of the knee, shoulder, hip
What is effort?
The force applied by the muscle.
What is resistance?
The pull against the muscle e.g weight of body
Which way do the effort arm arm and resistance arm point in a first class lever?
Effort- down
Weight- down
Which way does the effort arm point for second and third class levers?
Up
Does a first class have a high or low mechanical advantage?
It can have a high or low mechanical advantage depending on how long the weight and effort arm is.
Does a second class lever have a high or low mechanical advantage?
High mechanical advantage
Does a third class lever have a high or low mechanical advantage?
Low mechanical advantage
What can a lever with a high mechanical advantage do?
Carry large load with a small effort.
Can only move short distances at low speeds.
What can a lever with low mechanical advantage do?
Can move load quickly through a large range of movement.
Require a large effort to move a small load.
How do you work out mechanical advantage?
Mechanical advantage= effort arm x weight arm
If a lever has a longer weight arm than effort arm will it have a high or low mechanical advantage?
Low mechanical advantage
What is the axis for the sagittal plane?
Transverse axis
Step Towards
