Week 10 Center of Gravity

The point where weight is evenly distributed and balanced

The point where weight is concentrated

The point where weight acts (downwards)

center of gravity

based on mass

center of mass

based on weight

center of gravity

com and cog are usually equal (same location) when ____?

when gravity is the same everywhere

com and cog might not be in the same spot when ____?

when gravity is different in different places or an object’s mass is spread out evenly

center of gravity is ____ marked on an object?

NOT

force of gravity (weight) acts ____?

downward

if a net external force acts on a body, the acceleration caused by this net force is _____?

acceleration of center of gravity

how to quantify cog?

ΣT = Σ(W x r) = (ΣW) x rcg or Σ(M x r) = (ΣM) x rcg

the location of cog depends on ______?

the position of limbs

cog position of an object affects its _____?

stability

the lower cog, the more ____ it is.

stable

______ is the capacity of an object to return to equilibrium or to its original position after it has been displaced.

stability

why do we care about stability?

increases performance accuracy

factors that affect stability?

height of cog

size of the base of support

weight of the object