S Mark 45243 Bungee Cord  (100 cm)

Bungee cord consists of a core of elastic strands that are covered in a nylon or cotton sheath, and is commonly supplied in a wide variety of colours and weights. Bungee jumping cords, (and Vanuatuan vines, to a lesser degree) rely on the principle of elasticity to reduce the forces acting on the jumper. ... When vine or bungee jumpers leap from a great height they have a lot of gravitational potential energy. As they fall this is converted into energy of motion, or kinetic energy. If bungee jumper uses a steel cable rather than elastic rod, then the time of impact would decreases. As time of impact decreases, the average impact force increases in accordance with impulse-momentum relation