Balanced Forces Flashcards
1
Q
When is an object in equilibrium?
A
when a object is at rest or moving at a constant velocity
2
Q
What is the moment of a force?
A
force x perpendicular distance from the line of action of the for to the point
3
Q
What is the pricniple of moments in equilibrium?
A
the sum of the clockwise moments = the sum of the anticlockwise moments
4
Q
What is centre of mass?
A
the point through which a single force on the body has no turning effect
5
Q
What must occur for tilting to happen?
A
Fd > W b / 2 F = clockwise moment
W = anticlockwise
b = base width
6
Q
When does toppling occur?
A
when the line of action of its weight passes beyond the pivot
7
Q
Define the moment of a couple
A
perpendicular between the force and the lines of action
