Analyzingthephysicsofdancecanaddfundamentallytoadancersskill. Althoughdancersseldomseethemselvestotallyinphysicaltermsasbodymassmovingthroughspaceundertheinfluenceofwell-knownforcesandobeyingphysicallawsneithercantheyaffordtoignorethephysicsofmovement. Forexample, nomatterhowmuchadancerwishestoleapoffthefloorandthenstartturning, thelawofconservationofangularmomentumabsolutelypreventssuchamovement.
Somemovementsinvolvingprimarilyverticalorhorizontalmotionsofthebodyasawhole, inwhichrotationscanbeignored, canbestudiedusingsimpleequationsoflinearmotioninthreedimensions. However, rotationalmotionsrequiremorecomplexapproachesthatinvolveanalysesofthewaythebodysmassisdistributed, theaxesofrotationinvolvedindifferenttypesofmovement, andthesourcesoftheforcesthatproducetherotationalmovement.
17. Theprimarypurposeofthepassageisto
initiateadebateovertwoapproachestoanalyzingafieldofstudy
describehowonefieldofknowledgecanbeappliedtoanotherfield
pointoutthecontradictionsbetweentwodistincttheories
defineandelaborateonanacceptedscientificprinciple
discusstheapplicationofanewtheorywithinanewsetting
18. TheauthormentionsallofthefollowingascontributingtoanunderstandingofthephysicsofdanceEXCEPT: