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32 Cards in this Set

  • Front
  • Back
Biomechanics

the study of movement



Stability
the ability to maintained a balanced state
Force
the interaction that creates work, action, or physical change
Magnitude
how much force is applied to the dumbbells, barbells, or machine handles
Direction
the way in which the force is apllied
Point of Application
where the force is applied on the body or implement being used
Line of Action
an imaginary straight line drawn from the point of application of force through the direction of force
Angle of Pull
the angle at which a muscle pulls relative to the long axis of the bone on which it pulls
Work

what happens when a force is applied to an object


force times distance

Power
the work done in a unit of time
Newton's First Law
an object at rest tends to stay at rest and an object in motion tends to stay in motion
Inertia
the tendency for an object to remain in its current state
Resting Inertia
an object is at rest, it will stay at rest unless acted upon by some outside force
Moving Interia
when an object is in motion it will remain in motion unless acted upon by some outside force
Range of Motion ROM
movement of a joint from full flexion to full extension
Newtons Second Law of Motion

to create force you must place a mass into motion with acceleration and a change in velocity


F=MA

Mass
A body of coherent matter
Acceleration
the rate of change of velocity per unit of time
Velocity
the speed of something in a given direction
Momentum
the quantity of motion of a moving body, measured as a product of its mass and velocity
Newton's Third Law of Motion

equal and opposite reaction principle


objects in contact exert equal and opposite forces on eachother

Lever
Rigid bar that turns about an axis of rotation or a fulcrum
Fulcrum
the point on which a lever rests or is supported and on which it pivots
First Class Lever
fulcrum is in the middle, the effort applied on one side of the fulcrum and the resistance on the other
Second Class Lever
the load lies between the fulcrum and the effort

Third Class Lever
a lever in which the effort is placed between the fulcrum and the load

Torque
the magnitude of twist around an axis of rotation

Gravity
the downward pulling force that creates resistance
Center of Gravity
the point in the body around which your weight is equally distributed
Line of Gravity
a vertical line straight down from the center of gravity
Kinesthesis
the ability to perceive your position and movement of the body or body limbs in space
Visual Reference Point
a chosen point of focus to aid in stability an balance