You sign up for a bungee jump off a tall bridge. a thick rope with a fixed length of 20.0 m is tied to the bridge, and a bungee cord with an unstretched length of 8.00 m is then connected to the rope. the other end of the bungee cord is attached to your legs. you step off the bridge, falling from rest. the bungee cord does not start exerting any force on you until you have fallen a distance of 28.0 m (the sum of the rope's length and the unstretched length of the bungee cord). after that, it exerts an upward force on you that eventually brings you to rest, for an instant. assume the bungee cord, when stretched, acts like an ideal spring, and take g = 10 n/kg, to make the calculations easier. your mass is 40.0 kg. you fall a total distance of 49.0 m before coming instantaneously to rest. determine the spring constant of the bungee cord. n/m