A $7\mathrm{.}2$ m height and $15$ m long spillway discharges $94\frac{m^3}{s}$ discharge under a

head of $2$ m $.$ If a $1$:$9$ scale model of this spillway is to be constructed,

determine the model dimensions, head over spillway model and the model

discharge. If model is experiences a force of $7500$ N $,$ determine force on the

prototype.