Biomechanical movement analysis Flashcards
who included , (PREPARATION, OBSERVATION, EVALUATION DIAGNOSIS and INTERVENTION)
McGinnis 2013
What is Hay and Reid 1988, Deterministic model ?
Helps identify critical biomechanical variables- the critical features of the movement
who created the four stage model?
Knudson , 2013
To determine the length of a moment arm, you would measure?
The perpendicular distance from the axis of rotation to the forces line of actio
What is the relationship between torque and angular acceleration
The greater torque acting at the axis of rotation , the greater the angular acceleration of a given body
For any given muscle , the moment arm is largest when the angle of pull on the bone is closest to?
90’
What arm movement would be impaired by injury to the brachialis muscle
Flexion at the elbow
What is the torque if a 50N force is applied 2m from the axis of rotation?
100N
Which of the following statements about second class muscle lever is true?
Most common lever in the body
Fulcrum is located between the effort & resistance
Large weight can be lifted but the distance is limited
Any example is the lifting of a weight in the hand
Only small weights can be lifted, but the distance lifted is large
Large weight can be lifted but the distance lifted is large
Which of the following is an example of the use of a second class lever?
Rowing a boat Digging a hole in soil Wheelbarrowing waste soil See-sawing Completing a bicep-curl
Wheelbarrowing waste soil
An eccentric force tends to be?
Linear acceleration and angular acceleration
If you stepped off a high wall and landed on both feet, which would best describe predominat muscle actions?
The quadriceps are acting concentrically
The gluteus maximum act isometrically
There is a mixture of concentric and isokinetic actions in all active muscle
The quadriceps are actin eccentrically
The hamstring acts as and antagonist to the ankle plantar flexors
The quadriceps are acting eccentrically
You are holding weight stationary in each hand with your arm abducted , so they were parallel to the horizontal , which is true?
The biceps brachii is acting concentrically
The pectoral is major is acting eccentrically
There is a mixture of concentric and isokinetic actions in all acting muscles
The trapezius is acting eccentrically
The deltoids are acting isometrically
The deltoids are acting isometrically
Momentum =?
Momentum = mass x velocity
Kinetics
“The study of forces causing or resulting from motion”
Hall ,2012
What’s are the concepts of linear kinetics?
Force
Inertia
Momentum
Impulse
What’s inertia?
The property of an object to resist change
What is mass?
The measure of inertia
What is weight?
The measure of the force of gravity acting on an object( Newtons)
What is Newton’s first law of motion?
A body cannot be made to accelerat, decelerat or change direction Unless acted upon by force
What is Newton’s second law?
Greater force -> greater acceleration
What is Newton’s third law?
Every force is applied by a body is accompanied by a reaction force to the body
What are internal forces
Forces that act within the object or system whose motion is being investigated
What are external forces?
Those forces that act on an object as a result of its interaction with the environment surrounding it
