[问答题]
Can the diver of Fig. 8–29 do a somersault without having any initial rotatiodady hu0y3 *2nav,/ 6l hee(oin wl(i,ey a3h*ye 6/v2u 0ho ddan+j/h n s9egbra/5lt21 y i8kz4wr-ro yhen she leaves the b-b/j5tlg2wzoyhes ar n8/ yrr+4 9ik1 oard?
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
