[问答题]
Can the diver of Fig. w/gmii1 k3t9r d3t w4 :x6xxm us +4obfbsge-377stgw 8–29 do a somersault without having any initial rotation when she leaves the board?6ggub7b f43 +:-twm4swds3eoxx7s tx
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
