Turning effects of forces

• Pivot: fixed point at which something will turn.
• The moment of a force is bigged if the force is bigger.
• The moment of a force is bigger if it acts further from the pivot.
• The moment of a force is greatest if it acts at 90 degrees to the object it acts on.
• When a beam it balanced, it is at an equilibrium.
• The forces on a beam must be balanced to be at an equilibrium (no resultant force).
• The turning effects of the forces on a beam must also be balanced (no resultant turning effect) for it to be at an equilibrium.
• Moment: the turning effect of a force about a point.
• moment of a force = force x perpendicular distance from pivot to force
• If a force of 40N is 2.0 meters from a pivot the moment of the force is 80 Nm
• Total clockwise moment = total anti-clockwise moment