6.3 principle of moments Flashcards
1
Q
what is the moment of a force about any point defined as
A
the force x the perpendicular distance from the line of action of the force to the point (Nm)
2
Q
what effect does a greater distance have on a moment
A
greater moment
3
Q
what is the distance d always perpendicular to
A
the line of action of the force
4
Q
what must happen for a moment to be in equilibrium
A
the sum of the clockwise moments = the sum of the anti clockwise moments
this is known as the principle of moments
5
Q
what is the centre of mass of a body
A
the point through which a single force on the body has no turning effect
6
Q
centre of mass test
A
7
Q
calculate the weight of a meter ruler
A
