Question: 1 a 650 kg bungee jumper jumps off the top...
1. A 65.0 kg bungee jumper jumps off the top of a 53.0 meter high tower. The bungee cord becomes tight after the jumper falls 27.0m. As the jumper continues to fall, the cord stretches 18.0m, until the jumper is at her lowest point, 8.0 m above the ground. (lowest point is 0)
a). calculate the jumper's initial gravitational potential energy at the top of the tower.
b). calculate the spring constant of the bungee cord by assuming all of the initial gravitational potential energy becomes elastic potential energy.
2. a spring with an unstretched length of 12.0 cm is stretched to a length of 25.5 cm by hanging a 500 g mass from one end of it.
a). find the spring constant of the spring
b). how much energy is stored in the spring?