[问答题]
Can the diver of Fig. 8 tsr:+ s7crak2ubt.2t6xv1 gv m5 lbj4–29 do a somersault withoutvmr8ffcz x v1jj.tp:-l6+h0 h having any initial rotation when she leaves thxmz0r 1jh+c fv p6htj v-.:l8fe 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
