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moments are defined as r x f. if you have member [x,y,z] and force [u,v,w] being applied to the end of it you take the cross product, [w*y-v*z,U*z-w*x,v*x-u*y]. if the member and force are perpendicular just multiply them and if it creates a clockwise rotation it is negative.
Wiki User
∙ 14y ago
Wiki User
∙ 13y agoThe moment of a force about a point is equal to the force times the perpendicular distance to the point
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What is the value of Shear Force at Point of Contraflexure?
0, bending moment is at maximum
What is the difference between bending moment and deflection?
monment is force by distance however the deflection is a displacement of point measured by distance
How do you calculate the maximum bending moment for a simply supported beam of 6m long carrying uniformly distributed load only till 4.5 m long?
I assume this is a cantilever beam with one end fixed and the other free, the load starts at the free end and continues for 4.5 m if w is the load distribution then it has a force at centroid of 4.5 w acting at distance of (6.5 - 4.5/2 )from the end, or 4.25 m The max moment is 4.5 w x 4.25 = 19.125
Are moment of resistance and section modulus the same?
Yes, it is.Moment of resistance, usually denoted as W is a term in structural engineering. It is found from the moment of inertia I and the distance from the outside of the object concerned to its major axis e. W = I/eIt is used in structural calculations since the stress can be written as stress=moment/WSection modulus (Rigidity) : The ratio of moment of Inertia of the section (I) to the distance from it neutral axis to the most remote fiber (c)I am not an engineer and I never studied any of this properly, but as far as I can see, it's two names for the same thing.I was able to calculate successfully the moment of resistance from the (moment of inertia) / (distance from the outside of the section (on the same x/y axis) to the center)which means I must be getting it right.
What are the bending moment?
Positive and Negative are just directions. The main concern is whether there exist a bending moment or not. Then according to sign convention we classify bending moment as positive or negative. Elaborating on this point, If clockwise bending moments are taken as negative, then a negative bending moment within an element will cause "sagging", and a positive moment will cause "hogging" Sagging and hogging moments are important to differentiate. As hogging causes tension in the upper part of the beam x-section whereas sagging causes tension in the lower part of the x-section. This concept is of great importance in designing reinforced concrete members as we have to provide steel rebar in the zone of beam having tensile stress as concrete is weak in tension.
What is the purpose calculating moment of inertia?
Inertia is affected by an outside force. So if you calculate the moment of inertia, you calculate the magnitude and possibly the direction of the outside force. You can use this to determine acceleration.
What do you calculate to find a moment?
force x perpendicular distance from a specific, defined point
How do you calculate shear force and bending moment for the cantilever wing box structure?
Cry man, cry!
How do you calculate the moment capacity of a concrete section?
From ACI 318; 1) Solve for a (whitney compressive stress block) 2) Determine moment from force couple
How do you work out the moment?
To work out the moment of a force you times the force by the distance the force is from the pivot. So, basically: Moment = force x distance.
What does the moment of a force messure?
A moment of a force is a measurement of the turning effect of that force. For example, the force of a hand pushing down on a door handle creates a turning effect, and is therefore described as a moment.
What can change when moment changes?
moment depends upon the force and the perpendicular distance between the force and the point where we are finding the moment. so when moment changes either the force will change or the perpendicular distance will change.
What is the formula for moment arm?
we can show moment arm as r=torque divide by force.
Since a moment is a force times a distance is it true to call a moment a force?
No, a moment is a force x a distance, it is the product of a force and a distance. You get the same moment with a force of say 2 Newtons at 0.5 meter as a force of 1 Newton at 1 meter, so it is obviously not a force alone, but the product of a force and a distance, and its units are Newton.meters in the SI system
What is the turning effect moment of the load?
The turning effect, caused from force, is called The moment of a force.
What 2 things does the moment of a force depend on?
What two factors must be known in order to calculate the moment of a force? Torque = Force * distance Torque and distance must be perpendicular to each other If not you must determine the portion of the torque that is perpendicular.
What will be the shear force when bending moment is constant?
On SFD's and BMD's: The shear force will be 0, the shear force is the derivative of the bending moment at a point on shear force and bending moment diagrams. Otherwise: It depends on the loading.
