Figure 3.1 shows a tower crane with a load W. The sketch includes a pivot, an 80 000 N counterweight placed 5.0 m from the pivot, and the load W placed 8.0 m from the pivot.
(a)[3]
The counterweight weighs 80 000 N. It acts 5.0 m from the pivot, as illustrated in Fig. 3.1. Calculate the moment of the counterweight about the pivot. State the unit.
(b)[3]
The tower crane in Fig. 3.1 stays level while supporting the load W. Calculate the weight of load W.
Worked solution & mark scheme
This 6-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Force × distance from the pivot OR 80 000 × 5.0” …