[问答题]
Can the diver of Fig. 8–29 do a s
0p a,q c,c;cq8zztux :c:o qbr/21k ymomersault without having any
hww)ocqrnv/ 247vo3 g initial rotation when she leave
)co47qgnv ovr2/w 3hws 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.
本题详细解析:
暂无
