[问答题]
Can the diver of Fig.l m2+urk0 4ra( *d+)ev ofjuut 8–29 do a somersx 7fuc8bq:, /d lfuqwcz9:(qp 1 rfp1iault without having any initial rotation when she leaves tqqc/ w8 9pl zd:fqif:( u cu1fr,7pb1xhe board?
参考答案:
In order to do a somersault, the
diver needs some initial angular momentum when she leaves the diving board,
because angular momentum will be conserved during the free-fall motion of the
dive.She cannot exert a torque on
herself in isolation, and so if there is no angular momentum initially, there
will be no rotation during the rest of the dive.
Post time 2025-2-18 20:00:22
