[问答题]
Can the diver of Fig.vb0ty2x h v.7c 8–29 do a soqyts bbj*.0infe-n)1k( 7c somersault without having any initial rotation when she7s ) (*nnskqe y1bijb-0 .fcot 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.
Post time 2025-2-18 20:00:22
