6.3 The Principle of Moments Flashcards
1
Q
What is the moment of a force
A
Defined as the force*perpendicular distance from the line of action of the force to the point
moment=Fd
2
Q
Things to note about moment=Fd
A
The greater the distance d, the greater the moment
The distance d is the perpendicular distance from the line of action of the force to the point
3
Q
Principle of moments:
A
For equilibrium
The sum of the clockwise moments=the sum of the anticlockwise moments
4
Q
If there are three forces eg. weight
A
W1d1=W2d2+W3d3
5
Q
What is the centre of mass of a body
A
The point through which a single force on the body has no turning effect
