[问答题]
Can the diver of Fig.;mn kmw pfa.65b z5xiaop, :2blers 6t*tq.r5 8–29 do a f.uht p7a: mlfm+p1h3somersault without having any initial rotation when she leau3mh m+:f pt 7.l1ahfpves the 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
