Resulting from a light wind, the air pressure imbalance of 100 Pa acts across the 1.2-m...

Resulting from a light wind, the air pressure imbalance of 100 Pa acts across the 1.2-m by 2-m surface of the highway sign (Figure P4.11, see on page 172).

(a) Calculate the magnitude of the force acting on the sign.

(b) Calculate the moment produced about point A on the base of the signpole.