Biomechanics Flashcards
first class lever
a lever for which the muscle force and resistive force act on opposite sides of the body
fulcrum
the pivot point of a lever
mechanical advantage
the ratio of the moment arm through with a resistive force acts
moment arm
the perpendicular distance from the line of action of the force on the fulcrum
muscle force
force generated by biomechanical activity
resistive force
force generated by a source external to the body
second class lever
a lever which the muscle force and the resistive force act on the same side of the fulcrum, with the muscle force acting though the moment arm longer than that through which the resistive force acts
third class lever
a lever for which the muscle and resistive force act on the same side of the fulcrum, with the muscle force acting through a moment arm which is shorter than that through which the resistive force acts
torque
the degree to which a force tends to rotate an object about a specialized fulcrum. it is defined quantitatively as the magnitude of a force times the length of its moment arm
strength
the ability to exert force
acceleration
change in velocity per unit of time
power
Tim rate of doing work
work
the product of the force exerted on an object and the distance an object moves
angular displacement
the angle through which an object rotates
angular velocity
the objects rotational speed, measured in radians per second
