[问答题]
Can the diver of Fig. 8–29 do
qt:0k.d fzjc54 ssf-d a somersault without having any i
i7*rcl +k b4pmz5c2je 3ti pd1nitial rotation w
3pp t b75 1m2lcijk*r+ dcz4iehen she leaves 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.
本题详细解析:
暂无
Post time 2025-2-18 20:00:22