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Johan climbs a rock wall. He is attached to an elastic safety line that is 13.0 m long and has a spring constant of 1.2 kN / m. The safety line is attached to Johan's center of gravity, which is 3.1 m above the safety line's attachment point in the rock wall. He loses his grip and falls straight down. When the safety line is stretched, the case is braked. During the fall, the safety line is extended by 5.5 m. Johan turns up and down a few times before stopping. He weighs 86 kg. a) Calculate the oscillation time at the end of the oscillation process. b) How far below the rope's attachment point A does Johan hang when the hovering has ceased? c) Determine Johan's maximum speed during the fall.
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