[问答题]
Can the diver of Fig. 8–29 do a somersault wit/zkxa,0rx0)x nr l1 riq,wr4ulyh0 b9 hout having any : v(h9-o gsjy1 fbyx kmv0;bk9initial rotation when she le;9 f:b9xbk1jg yv hmy-0o(v skaves 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
