(Solved): A square sign of side 1 m is a uniform wooden board PQRS. The sign is attached to a vertical wall b ...

A square sign of side 1 m is a uniform wooden board

. The sign is attached to a vertical wall by a hinge

so that

rests against the wall vertically below

. If the weight of the sign is 10 N , the force exerted by the hinge on the sign at

is A. 5 N B. 8.7 N C. 10 N D. 11.2 N Example 4.9 Some time ago, a South African company speculated on a drop in fixed-rate interest rates and swapped ZAR 10 m at

p.a., semiannually and fixed, for ZAR 10 m at the six-month ZAR LIBOR. That is, the contract stipulates that every six months, the firm pays the six-month ZAR LIBOR rate on a notional ZAR IOm and receives

on the same notional amount. Suppose that ZAR medium-term interest rates have fallen substantially below

. The company feckons it has made a nice profit on its swap contract and wants to lock in the gain by selling the swap. the swan