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Chapter 10, Problem 10.22QP

a)

To determine

Draw the graph between load and deflection using spread sheet.

b)

To determine

Plot the proportional limit on the graph.

c)

To determine

The modulus of rupture of the wood lumber.

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A 100 mm * 100 mm wood lumber was subjected to bending with a span of 1.5 m until failure by applying a load in the middle of its span. The load and the deflection in the middle of the span were recorded as shown in Table P10.21. a. Using a computer spreadsheet program, plot the load–deflection relationship. b. Plot the proportional limit on the graph. c. Calculate the modulus of rupture (flexure strength).
A wood specimen was subjected to bending until failure by applying a loadin the middle of its span. The specimen has a cross section of 1 in. * 1 in.(actual dimensions) and a span of 14 in. between the simple supports. Theload and the deflection in the middle of the span were recorded as shown inTable P10.22.a. Using a computer spreadsheet program, plot the load–deflectionrelationship.b. Plot the proportional limit on the graph.c. Calculate the modulus of rupture (flexure strength).
a tank containing liquid with sg = 2.34 was put on a weighing scale and registered a total weight of 85 kg. obtain the new reading on the weighing scale (in kg). if a 82 mm by 74 mm piece of wood is held vertically in the water to a depth of 529 mm.
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