HEAL1000 Lecture Notes - Lecture 3: Momentum Movement, Electromyography, Goniometer
Document Summary
The center of mass defines the point at which the whole mass can be considered to be located. (cid:498)point around which the mass and weight of a body are balanced(cid:499) (not always center of an object) Centre of gravity (line of action of the force of gravity) Area defined by straight lines connecting the peripheral most points in contact with the surface, this can involve a body an an object (sitting on a chair) Stability- the resistance to disruption of equilibrium: varies with direction, affected by: forces, torque, body alignment, limb orientation, can be: Linear (resistance to being moved in a straight line: to increase: increase friction, mass. Angular (cid:523)resistance to being (cid:494)tipped over(cid:495)(cid:524: to increase: bring cog in bos (more centered=more stable), increase size of bos (walking aids increase bos), decrease height of com. Forced based: force is used to create movement, push like pattern.