[问答题]
Can the diver of Fig. 8–29 do a somerkif + 9x6)6fq.7bs z-gmdsqu esault without having any initsi 6sev 74su7+ y7p6ahpm zvg3ial rotation whengsieupz y7m+6 sv6p43v7as h 7 she 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
