<Li> Skywalk is a form of highwire which is performed at great heights and length . A skywalk is performed outdoors between tall building, gorges, across waterfalls or other natural and man - made structures . </Li> <P> Acrobats maintain their balance by positioning their centre of mass directly over their base of support, i.e. shifting most of their weight over their legs, arms or whatever part of their body they are using to hold them up . When they are on the ground with their feet side by side, the base of support is wide in the lateral direction but narrow in the sagittal (back - to - front) direction . In the case of highwire - walkers, their feet are parallel with each other, one foot positioned in front of the other while on the wire . Therefore, a tightwire walker's sway is side to side, their lateral support having been drastically reduced . In both cases, whether side by side or parallel, the ankle is the pivot point . </P> <P> A wire - walker may use a pole for balance or may stretch out his arms perpendicular to his trunk in the manner of a pole . This technique provides several advantages . It distributes mass away from the pivot point, thereby increasing the moment of inertia . This reduces angular acceleration, so a greater torque is required to rotate the performer over the wire . The result is less tipping . In addition the performer can also correct sway by rotating the pole . This will create an equal and opposite torque on the body . </P> <P> Tightwire - walkers typically perform in very thin and flexible, leather - soled slippers with a full length suede or leather sole to protect the feet from abrasions and bruises while still allowing the foot to curve around the wire . Though very infrequent in performance, amateur, hobbyist, or inexperienced funambulists will often walk barefoot so that the wire can be grasped between the big and second toe . This is more often done when using a rope, as the softer and silkier fibres are less taxing on the bare foot than the harder and more abrasive braided wire . </P>

Why do tightrope walkers carry a long pole physics
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