Moments and Equilibrium Flashcards
What is a lever?
A rigid bar free to rotate about a fixed fulcrum
What is effort?
The force exerted on an object
What is load?
The force produced to move something at the other end
What is the fulcrum?
The point at which a lever turns or is supported
What is the moment of a force?
The magnitude of the force multiplied by the perpendicular distance from the axis to the force
Clockwise moments are pushed down on the…
Right
Anticlockwise moments push down on the…
Left
When is a body in a state of equilibrium?
When the clockwise moments equal the anticlockwise moments
When in static equilibrium the body is…
Not moving
When in dynamic equilibrium the body is…
Moving but not accelerating
State the conditions of equilibrium.
Vector forces sum to zero, clockwise and anticlockwise moments sum to zero
What is a couple?
A pair of equal and parallel forces that turn in opposite directions, eg scissors
What is the moment of a couple ?
A torque
