Part C. When a comet passes olose to Earth, the comet's path will bend toward Earth due to the gravitational force between the two. The gravitational force, F, is related to the speed of the
comet V, by F= wk, where m is the mass of the comet and d is the distance between the
comet and Earth,
Rewrite the equation to solve for V.

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).