Achadu

I know nothing about shear modulus

It was reported that a mild earthquake occurred in brass with a result that the plate which is 0.8m square of 0.5m thick usually attached to the base of the antenna pole had its edges displaced by 0.016cm. If the plate is made of brass with a shear modulus of 0.36 x 10^11 N/m². Find the force exerted by the earthquake on the plate.