[问答题]
Can the diver of Fig. 8–29 do rcl91g jn ,3s8emz/xfy m+ h7wa somersault withr j- nw31 (l:p0er e;ak5yqwkyout having any initial rotation when she leaves thqy ln 5rk0jrk3py1-ew:a;ew(e 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
