Moments Flashcards
1
Q
What is the formula for the moment about the point?
what are the units for moments?
A
Perpendicular distance x magnitude of force.
Nm (newton metres)
2
Q
What must be accounted for when there is a pivot in moments?
A
There is a normal reaction force upwards.
3
Q
What are the two types of question in equilibrium moments and what is different about them?
A
- Beam, which pivot has normal reaction force
- String, which strings have tension.
4
Q
What are the features of a moment that in equilibrium?
A
- Upwards forces = downwards forces.
- CW moments = ACW moments.
5
Q
What is a uniform rod?
A
-The weight acts exactly at the centre
6
Q
what is a non-uniform rod?
A
-It cannot be assumed that centre of mass is at the centre.
7
Q
What does it mean if a rod is on the point of turning around B?
A
-The other pivot can be removed.
