Fig. 2.1 illustrates a concrete beam lying on the ground.
(a)[4]
Calculate the pressure exerted on the ground by the concrete beam.
(b)[3]
Calculate the moment of the 1030 N force about the pivot.
(c)[1]
Describe how the builder can use a smaller force to lift the beam.
(d)[1]
State why the beam shown in Fig. 2.3 is less stable than the beam shown in Fig. 2.1.
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