Final answer:
To calculate the bending moment for a square footing over sandy soil, you need to use the formula Bending Moment = (Pressure on the Footing) x (Lever Arm).
Step-by-step explanation:
To find the bending moment for a square footing over sandy soil, you need to know the dimensions of the footing and the properties of the soil. The bending moment is calculated using the formula:
Bending Moment = (Pressure on the Footing) x (Lever Arm)
The pressure on the footing can be calculated by dividing the total force exerted on the footing by its area. The lever arm is the distance from the center of the footing to the point where the bending moment is being calculated. By substituting the given parameters into the formula, you can find the bending moment.