[问答题]
Can the diver of Fig. 8–29 do a somersault without having any initialk/xb m+k u jnc-df*0:-dsgha7 rotatiov2pmzu ekrsy2/b5vbp l.:k ;qc r+31o n when she leaves thyo. 1z3+:qlr ker25uvkpb 2 bc/vs;p me 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
