Calculate the moment and the sag

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In summary, the formula for calculating moment and sag is M = WL^2 / 8 and S = WL^3 / 48E, where M is the moment, W is the weight of the object, L is the length of the object, and E is the modulus of elasticity. Calculating moment and sag is important in engineering and physics as it helps determine the amount of force or stress an object can withstand without breaking or deforming. To calculate moment and sag in a real-life scenario, you would need to measure the weight and length of the object, and determine the modulus of elasticity based on the material it is made of. The weight and length of an object directly affect its moment and sag, with greater weight and length
  • #1
Mathijsgri
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The bridge is full extend 35 meters long, and retracted 17,5 meter long.
When the bridge is installed it rest on piont(375kN) and a
hydraulic pomp (525kN) , the mass of the bridge is 15 metric ton.

my question is how do I calculate the bending moment diagrams when it is extending and how do i calculate the bending when it is at 35 meters.
 

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More information is needed before this problem can be analysed properly .

Is this a homework question ?
 

1. What is the formula for calculating moment and sag?

The formula for calculating moment and sag is M = WL^2 / 8 and S = WL^3 / 48E, where M is the moment, W is the weight of the object, L is the length of the object, and E is the modulus of elasticity.

2. What is the significance of calculating moment and sag?

Calculating moment and sag is important in engineering and physics as it helps determine the amount of force or stress an object can withstand without breaking or deforming. It is also used to analyze the structural integrity of bridges, buildings, and other structures.

3. How do you calculate the moment and sag in a real-life scenario?

In a real-life scenario, you would need to measure the weight and length of the object, and determine the modulus of elasticity based on the material it is made of. Then, you can plug those values into the formula M = WL^2 / 8 and S = WL^3 / 48E to calculate the moment and sag.

4. How does the weight and length of an object affect its moment and sag?

The weight and length of an object directly affect its moment and sag. The greater the weight and length, the higher the moment and sag will be. This is because more weight and length means more force and stress on the object, causing it to bend or deform more.

5. Can moment and sag be negative values?

Yes, moment and sag can be negative values. This means that the object is experiencing compression instead of tension. In other words, the force acting on the object is pushing it inward instead of pulling it outward.

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