Pis the point (2,5) and Q is the point (6, 0). A line l is drawn through P perpendicular to PQ to meet the y-axis at the
point R.
a.) Find the equation of the line l.
b.) Find the coordinates of the point R.
c.) Find the area of triangle OPR where O is the origin.
Find the equation​

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).