[问答题]
Can the diver of Fig. 8–29 do0 r(e ypp5r:o5jt3lo y a ykao6; 7xh,,v 4f 0ea6h gdcc( lzw(r;kjccy4 somersault without having any initial rotation when she leaves th6ockr cavy7a f zh6(cyc (h,d04 xg,w;lkj4 ;ee 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
