A15.0-kg board (2.30 meters in length), sits horizontally at rest atop two vertical springs (spring constants of 680 n/m). spring #1 is at the left end of the board while spring #2 is 0.60 meters from the right. describe a free-body diagram for the board. type, source, receiver, and direction must be specified for each force. determine the magnitudes of each of the forces exerted upon the board. determine the compression of each of the springs. note that you will get different answers for each spring, but you should still assume that the board is horizontal (otherwise the problem gets ridiculously complicated).

chemical energy --> gravitational potential energy --> kinetic energy --> elastic potential energy --> gravitational potential energy

explanation:

when emma starts the hike, the chemical energy stored in her body is used to climb up the mountain, and so she gains gravitational potential energy (because at the end, she will be at a higher height h above the ground). then she goes bungee jumping: as she falls, this gravitational potential energy is converted into kinetic energy (because her speed increases as she falls down), until the point when the rope stretches, and she stops moving. at that moment, all the kinetic energy is converted into elastic potential energy due to the stretching of the rope. then, this energy is released because the rope returns to its natural length, and emma gains a small increase in altitude , so she gains some gravitational potential energy.