[问答题]
Can the diver of Fig. 8–29 do a somersault without havinz33a l rphis37g any initial rotaug(.(32eoj s5amym2 n:sye 7 kvqml,x tion when she leaves the boar2(smm:. 2syy leeknu m(q,vg357j ax od?
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
