Moment
In terms of physics, a moment is the product of a physical quantity and a certain distance, and is usually defined with respect to a fixed reference point. Generally, a moment can be produced by any physical quantity that is multiplied by distance, with commonly-used quantities including force, mass, electric charge, and so on.
The moment of force that acts on an object, known as ‘torque’, is a measure of its tendency to cause the object to rotate about a specific point or axis, and is the product of the force and its distance from the point or axis.
Moment (M) = force (F) x distance (d)
For a moment to develop, the force must act in such a manner that the object begins (or would begin) to twist; in other words, when the force does not have an equal and opposite force directly along the line of action. For example, if two people are stood on opposite sides of a door and both are pushing on it with an equal force then there is equilibrium. If one person stops pushing then there would be no opposing force and the person still pushing would have created a moment of force.
The fixed reference point is also known as the ‘centre of moments’. This can be the actual point about which rotation occurs due to the force, or the axis about which the force may be considered as causing rotation.
A bending moment (BM) is a measure of the bending effect that can occur when an external force is applied to a structural element. This concept is important in structural engineering as it is can be used to calculate where, and how much bending may occur when forces are applied.
For more information see: Bending moment.
[edit] Related articles on Designing Buildings Wiki
Featured articles and news
ECA progress on Welsh Recharging Electrical Skills Charter
Working hard to make progress on the ‘asks’ of the Recharging Electrical Skills Charter at the Senedd in Wales.
A brief history from 1890s to 2020s.
CIOB and CORBON combine forces
To elevate professional standards in Nigeria’s construction industry.
Amendment to the GB Energy Bill welcomed by ECA
Move prevents nationally-owned energy company from investing in solar panels produced by modern slavery.
Gregor Harvie argues that AI is state-sanctioned theft of IP.
Heat pumps, vehicle chargers and heating appliances must be sold with smart functionality.
Experimental AI housing target help for councils
Experimental AI could help councils meet housing targets by digitising records.
New-style degrees set for reformed ARB accreditation
Following the ARB Tomorrow's Architects competency outcomes for Architects.
BSRIA Occupant Wellbeing survey BOW
Occupant satisfaction and wellbeing tool inc. physical environment, indoor facilities, functionality and accessibility.
Preserving, waterproofing and decorating buildings.
Many resources for visitors aswell as new features for members.
Using technology to empower communities
The Community data platform; capturing the DNA of a place and fostering participation, for better design.
Heat pump and wind turbine sound calculations for PDRs
MCS publish updated sound calculation standards for permitted development installations.
Homes England creates largest housing-led site in the North
Successful, 34 hectare land acquisition with the residential allocation now completed.
Scottish apprenticeship training proposals
General support although better accountability and transparency is sought.
The history of building regulations
A story of belated action in response to crisis.
Moisture, fire safety and emerging trends in living walls
How wet is your wall?
Current policy explained and newly published consultation by the UK and Welsh Governments.
British architecture 1919–39. Book review.
Conservation of listed prefabs in Moseley.
Energy industry calls for urgent reform.