Ali cycled laps on a bicycle path surrounding a lake. Each lap was the same length. If he cycled a total of , what was the length of each lap around the lake? Write your answer in feet.

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).