MOMENTS
Point of action
Force
moment arm
F
MOMENT = a x F
The MOMENT of a force about a point of action is the magnitude of the
force multiplied by the distance from the point perpendicular to the line of action of
the force.
Point of
action
F
A
f
a
If F x a
= f x A then the forces ‘balance’
a
(If the sum of the moments is
zero the object is in equilibrium)