This experiment simulate shear force at a cross section of simply supported beam.

A simply supported beam will be given loads (P1, P2, P3) as shown in figure. The loads are located accordingly into 3 positions (L1, L2, L3), while load indicator is positioned at x-x section (Lx). The load indicator will shows the shearing force happened at the cross section. Bending moment can be calculated by using mathematical formula.


1. Insert value for each of load hangers (P1, P2, P3).

2. Set distance for beam span length.

3. Set distance of each load hangers based on given scale.

4. The indicator is placed at 60 cm. Record load indicator output.

5. Repeat steps for different setup.

6. Use mathematical calculation to compare the results.

Load, P1 Newton,N
Load, P2 Newton,N
Load, P3 Newton,N

Ruler (0 to 100cm)
Beam span lengthcm
Length, L1 cm
Length, L2 cm
Length, L3 cm

Indicator Output Display (N) at point 60cm= ... Newton

Reset data

When a beam is subjected to external force, the visible external effects can be observed are bending deformation (deflection) and cracking of molecule structure as it experiencing compression on the top section while extension on the bottom section.

The internal forces which respond to the placement of an external load have two components which are shear force and normal forces. Shear forces are oriented in the vertical direction while normal forces are oriented along axis of the beam. These will produce internal stresses and strains in the beam.

The differences between experimental measurement and theoretical calculation were caused by experimental errors such us sensitiveness of digital reading sensor to any movement or vibration of beam, the distance of weights position were measured inaccurate, and the slotted weight are inaccurate.

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