球入水时初熟度为 V0,
V0 = sqrt(2gh)
球入水后的主力
F = bV0,即 F = b sqrt(2gh)
假设福利于重力抵消,主力是唯一的作用力,冲,冲,主力向前冲!
球入水时初熟度为 V0,
V0 = sqrt(2gh)
球入水后的主力
F = bV0,即 F = b sqrt(2gh)
假设福利于重力抵消,主力是唯一的作用力,冲,冲,主力向前冲!
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