The area, A, of an isosceles right triangle is a function of the length of its legs, s, and is represented by the equation: A= 1/2 s2. Is this function linear or nonlinear? Explain and justify your answer.

Amass weighing 16 pounds stretches a spring 8/3 feet. the mass is initially released from rest from a point 2 feet below the equilibrium position, and the subsequent motion takes place in a medium that offers a damping force that is numerically equal to 1/2 the instantaneous velocity. find the equation of motion if the mass is driven by an external force equal to f(t)=cos(2t).