Chapter 1.3 - Moments Flashcards
1
Q
State how to calculate the moment of a force about a point.
A
Moment of a force about a point is the product of the force and the perpendicular distance from the line of action of the force to the point.
2
Q
Name the SI unit of the moment of a force.
A
Newton metre or;
Nm or;
kgm2s-2
3
Q
State the principle of moments.
A
When a system is in rotational equilibrium the sum of the clockwise moments about any point is equal to the sum of the anti-clockwise moments about the same point.
4
Q
Define centre of mass.
A
The point at which the entire mass of an object seems to be concentrated.
5
Q
Define centre of gravity.
A
The point through which the entire weight of an object seems to act.
