Moments Flashcards
1
Q
What is the formula for moments?
A
Moments (Nm) = Force (N) * Distance (m)
2
Q
What is the principle of moments?
A
For objects (i.e. plank) to be in equilibrium: Sum of ACW moments = Sum of CW moments
ACW = Anti-clockwise CW = Clockwise
3
Q
How do you determine which object is clockwise and which is anti-clockwise?
A
Picture a clock, follow the direction of the force (either weight, down, or lift, up) and see how that direction rotates.
4
Q
When would an object topple over?
A
When it’s centre of mass goes beyond the point the object is pivoting over (i.e. if the weight of a box is pulling it to the ground)
5
Q
What is the moment of a couple?
A
As forces in couples are equal, it is defined as the force * distance between the 2 forces
