[问答题]
Can the diver of Fig. 8–29 do a somer;s77yt3d xp dx)r3vxj h3 cr*jsault wu/fr(2 vy3apqv x1jz ./oe,dj0tomt ve+3h 3uithout having any initial rotation when she l1eq +o v /vj3t0/.my3va3 u ujod2xeftz p(,rheaves 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
