Moments Flashcards
1
Q
Moment of a force
A
A force that has a turning effect causes an object to turn
2
Q
Lever
A
Any rigid object free to turn about a fixed point called a fulcrum
3
Q
Fulcrum
A
The part the object turns about , like the hinge on a door
4
Q
A couple
A
Two parallel forces with the same magnitude acting in opposite directions
Turning a steering wheel
5
Q
Torque
A
The moment of a couple , the cause for the two parallel forces
6
Q
Equilibrium
A
A state of balance in which all of the forces and moments cancel out (not accelerating)
7
Q
2 types of equilibrium
A
Static and Dynamic
8
Q
First law of equilibrium
A
The vector sums of the forces is zero ( net force is 0)
9
Q
Second law of equilibrium
A
The sum of the moments about any points is zero ( sum of clockwise moments equals sum of anti-clockwise moments )
