The deflection of a center loaded beam is approximately FL3/48EI. For a beam with square cross section, I = b4/12 (where b is the length of a side). If the deflection is 5 cm, b is 4 inches, L = 10 ft, and E = 20 GPa, then what is the load?

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The deflection of a center loaded beam is approximately FL<sup>3</sup>/48EI. For a beam with square cross section, I = b<sup>4</sup>/12 (where b is the length of a side). If the deflection is 5 cm, b is 4 inches, L = 10 ft, and E = 20 GPa, then what is the load?