Turning forces and centre of mass Flashcards
Equation for a moment
Moment(NM)= Force(N) *perpendicular distance between line of action and pivot
A larger force means…
a larger moment
Longer spanner and the same force means…
a larger moment because the distance is greater
For maximum moment…
you need to push at right angles (perpendicular distance from line of action and pivot)
Centre of mass
the point where the whole mass of the object is concentrated.
A freely suspended object will swing until its centre of mass is…
Vertically below the point of suspension.
For simple shapes the centre of mass is…
where the lines of symmetry cross.
Total anticlockwise moments
total anticlockwise moments= total clockwise moments.
If the total anticlockwise moments do not equal the total clockwise moments, there will be…
a resultant moment so the object will turn.
Most stable objects have…
a wide base and low centre of mass
An object will begin to tip over if the…
centre of mass moves beyond the edge of its base
If the weight doesn’t act in line with the pivot then…
it will cause a resultant moment
