732 Center of Gravity & Base of Support
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15 Terms
center of gravity
point about which the effects of gravity are completely balanced; it coincides with center of mass which is the point about which all mass of a body is evenly distributed
line of gravity
an imaginary vertical line from the COG to the ground or surface that the object or person is on; it represents the force of gravity acting on the body
where is the COG with a person of greater upper body mass
COG will be higher
base of support
the area enclosed by the outermost edges of where the body is contacting the supporting surface
stability
th resistance to disruptions of equilibrium
as stability of an object increases…
more external force or effort is required to disrupt its equilibrium to move the object
is a larger or smaller base of support more stable?
a larger base of support is more stable
where should the center of gravity and the line of gravity be to maintain stability?
must be within the base of support and the closer the line of gravity to the center of the base of support the more stable the posture
what is more stable a higher or lower center of gravity?
a lower center of gravity
mass and stability
more mass is associated with greater stability
friction and stability
an increase in friction will increase stability
what has greater stability through friction, walking on ice or walking on cement?
walking on cement has greater stability because there is more friction
shape of the base of support
for more stability, widen the base of support in the direction of an applied external force
balance
one’s ability to maintain equilibrium
balance and stability
the more stable a person is, the easier it will be for them to maintain balance