BIOMECHANICS Flashcards
In which direction should a therapist apply their resistance
Perpendicular to the segment, meaning the entire force is rotatory
What does applying a force perpendicular to the segment mean for the therapist
- they can maximise their applied torque
- they can generate a particular amount of torque by applying minimal forces
- this makes their job easier and no forces are wasted
During hip abduction, it is easier for the therapist to pause down at the ankle rather than the distal thigh/knee
Yes, as they would double their moment arm. Therefore, for any given applied force, they will generate approximately double the torque as torque = force x perpendicular distance
What is a force
A push or a pull
What is an external force
Forces acting on us that originate outside the body
What are examples of external forces
Contact forces, friction, ground reaction force
What is an internal force
Force generated by muscles, tendons, ligs or one bone pushing against another, within us
What are vectors
They a forces with a size and direction
What are scalars
Things that can be represented by a number
What is a body
It is the entity that has a force applied to it that is in static equilibrium
How is the accelatorary effect of a body impacted
Based on the location/point at which each forces are applied to the body
Why are forces added
To illustrate the net effect of two or more forces as a single resultant force
What is a single force
The hypotenuse of a triangle
What is a therapist applied force
One applied against gravity and with resistance
How is a therapist-applied force, applied
- stabilising the proximal segment
- apply resistance at right angles/perpendicular to the segment
- applied as far away from the joint being tested
