Equilibrium and Forces Revision

HideShow resource information
What are the two conditions for equilibrium?
No resultant force and no resultant moment
1 of 10
What is the principle of moments?
For an object not to rotate. Equal forces on both sides and everything is level
2 of 10
What is stable equilibrium?
If tilted, the object will move back to its original position without toppling
3 of 10
What is unstable equilibrium?
If tilted even slightly, the object will topple one way or another
4 of 10
How do you work out a moment?
Force x Perpendicular distance between the pivot and the line of action of the force (M = F x d)
5 of 10
What is the definition of centre of mass?
The centre of mass of a body is the point where a single force on the body has no turning effect
6 of 10
What is the definition of centre of gravity?
A point from which the weight of a body may be considered to act. In uniform gravity, it is the same as the centre of mass
7 of 10
How do you work out the moment of a Couple?
One force x Distance between the two forces
8 of 10
What is a Couple?
A pair of equal and opposite forces acting on a body but not along the same line
9 of 10
What is the equation that fits with the principle of moments?
What is the equation that fits with the principle of moments?
10 of 10

Other cards in this set

Card 2

Front

What is the principle of moments?

Back

For an object not to rotate. Equal forces on both sides and everything is level

Card 3

Front

What is stable equilibrium?

Card 4

Front

What is unstable equilibrium?

Card 5

Front

How do you work out a moment?