Ch 11: Torque and Levers Flashcards
1
Q
Rotational force definition
A
when force is not in line with the center of gravity
2
Q
Torque equation
A
Torque = Magnitude of force x Length of the moment arm
3
Q
What is a moment arm?
A
Perpendicular distance from the line of force to the axes of ratation
4
Q
What is torque summation?
A
no movement, linear movement, or rotary movement
5
Q
What are the anatomical levers?
A
Muscle = applied force Resistance = load, or force to overcome Joint = fulcrum, or axis of rotation
6
Q
1st class lever
A
joint is between resistance and muscle
ex: back of neck muscles holding face from falling forward
7
Q
2nd class levers
A
resistance is between the muscle and joint.
ex: ball of foot plants on ground while gastrocnemius pulls body weight upward
8
Q
3rd class levers
A
muscle is in between the joint and the resistance.
ex: biceps pull from between the elbow an resistance
