A-LevelPhysicsWork, energy and power9702/12 · Oct/Nov 2018 · Q151 Mark
A bungee jumper on a platform over a river is attached to an elastic rope that is 20 m long when unstretched. He falls towards the river and his lowest point is 30 m below the platform. The initial gravitational potential energy of the jumper is transferred to other forms during the jump. Which other forms of energy do the jumper and rope have when the jumper has fallen half-way and when he is at the lowest point of his jump?
Ahalf-way: kinetic energy and elastic potential energy, lowest point: kinetic energy and elastic potential energy
Bhalf-way: kinetic energy and elastic potential energy, lowest point: elastic potential energy only
Chalf-way: kinetic energy only, lowest point: kinetic energy and elastic potential energy
Dhalf-way: kinetic energy only, lowest point: elastic potential energy only
✓ Correct answer
D: half-way: kinetic energy only, lowest point: elastic potential energy only
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