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Problem 8. A bungee jumper with a mass of 61 kg jumps off a bridge spanning the Salt River.The mass less bungee cord is normally 25 m long and acts

just like a spring when it is stretched beyond that length. The jumper reaches his lowest point 42.9 m below the bridge. (a) Find the force constant of the bungee cord. (b) Determine the magnitude and direction of the jumper's acceleration when he is at the lowest point.

Fig: 1