1.3 Moments Flashcards
1
Q
What is the centre of gravity of an object?
A
A point where the entire weight of the object seems to act.
2
Q
What is the centre of mass of an object?
A
A point where the entire mass of the object seems to act.
3
Q
What 2 concepts will improve the stability of an object?
A
A wide base and low centre of gravity.
4
Q
What is the definition of a moment?
A
The product of force and the perpendicular distance to a point/pivot.
5
Q
What is the principle of moments?
A
When a system is in equilibrium, the sum if the clockwise moments about a point is equal to the sum of the anticlockwise moments about the same point.
6
Q
What is a couple?
A
2 forces that act in opposite directions, not along the same line, and which cause rotation.
