Question

Experiment 1: Bending Moment Variation at the point of Loading This experiment examines how bending moment varies at the point of loading. Figure 3 shows the force diagram for the beam. Check the Digital Force Display meter reads zero with no load. Place a hanger with a 100 g mass at the cut'. Record the Digital Force Display reading in a table as in Table 1. Repeat using masses of 200 g. 300 g. 400 and 500 g Convert the mass into a load (in N) and the force reading into a bending moment (Nm). Remember, Bending moment at the cut (in Nm) Displayed force x 0.125 M Calculate the theoretical bending moment at the cut and complete Table 2. Figure 3 Force diagram The equation we will use in this experiment is: Experimental Theoretical bending moment bending moment (Nm) BM (at cut) = wall-a) Mass I Load Free gl ( N N 0 0.00 0 100 Cr 0. 200 1961 300 2. 4 2.3 400 3.927.2 500 4.91 3. You may find the following table useful in converting the masses used in the experiments to loads. Table 2 Results for Experiment 1 Mass (Grams) 100 200 300 400 Load (Newtons) 0.88 1.06 2.94 3.92 Plot a graph which compares your experimental results to those you calculated using the theory. Comment on the shape of the graph. What does it tell us about how bending moment varies at the point of loading? Does the equation we used accurwiely predict the behaviour of the beam? Table 1 Grams to Newtons conversion table CUT lood RA Pitch of lood hungers = 20mm Length of lever com = 125 mm Bonding moment (Nm) Make agraph and comment

Answer 1

Experimental and Theoretical Bending moments are calculated for the load.

Graph of B.M Vs Load is drawn for experimental and theoretical values.

Graph is a linear straight line .

The formula used to find B.M accurately predict the behaviour of the beam (only slight variations ).

(Please give a thumbs up ).