[问答题]
Can the diver of Fig. i/3 tc :uyqj.g8–29 do a spk4 chk lu 0:u.z,1yywomersault without having any initial rotation when she lea,ly4. 1ykpz w:hckuu 0ves 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
