Moment = Fxd, where F & d are perpendicular to
oen another.
Year 2 Mechanics
Ch4 Moments Summary To resolve forces:
If a body is in equilibrium, there is no resultant
[4] force & the sum of moments abt any point is zero.
The instant when tilting occurs abt a point, the
reaction @ any other support goes to zero.
For a rigid body in static equilibrium:
o the body is stationary.
o the resultant force in any direction is zero.
Mechanics Yr 2 Ch7 o the resultant moment is zero.
Applications of forces Threaded = tension is uniform, attached = tension
can be diff on diff strings.
Chapter summary Generally, FR ≤ μ R.
[7] When the body is on the point of slipping or is
moving, Fmax = μR.
If connected particles are moving in different
directions then consider them separately.
oen another.
Year 2 Mechanics
Ch4 Moments Summary To resolve forces:
If a body is in equilibrium, there is no resultant
[4] force & the sum of moments abt any point is zero.
The instant when tilting occurs abt a point, the
reaction @ any other support goes to zero.
For a rigid body in static equilibrium:
o the body is stationary.
o the resultant force in any direction is zero.
Mechanics Yr 2 Ch7 o the resultant moment is zero.
Applications of forces Threaded = tension is uniform, attached = tension
can be diff on diff strings.
Chapter summary Generally, FR ≤ μ R.
[7] When the body is on the point of slipping or is
moving, Fmax = μR.
If connected particles are moving in different
directions then consider them separately.
