4 A uniform rod of length 60 cm has a weight of 14 N. It is pivoted at one end and held
in a horizontal position by a thread tied to its other end, as shown in Fig. 4.17.
The thread makes an angle of 50° with the horizontal. Calculate:
a the moment of the weight of the rod about the pivot,
b the tension I in the thread required to hold the rod horizontally.
pivot
A Figure 4.17
60 cm
50°
AT