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11-4-11-4-21.41v=gts=21gt2v2=2gs250Hz50Hz31A541-4-1BCDEFT2As1s2s3s4s5s6mm3vn=a212345633)()(TssssssavtaBCDEFvta11-4-2ABLlL2L3CD?21-4-529.81?g9.8m/s234ms217m??(g=10ms2)4711234567(cm)06.0312.5019.3526.5434.1542.15a=___________ms2(50Hz)51-4-5ABCDEF64220V50Hz,A1BCDEvBvCvDvE2(1)vta3f=49Hz12.95m0.1s?g10ms231-4-81-4-92.42cm2.75cm1-4-621-4-60.02__________m/s211g9.8m/s2()2()(1-4-7)2s45m()A1ms2B2ms2C3ms2D4ms21-4-73.82A.2B.2.5mC.2.9mD.3.5m41-4-8A2S6SB2SC1S4SD4S5()ABCD61-4-9O5123456s15.18cms24.40cms33.62cms42.78cms52.00cms61.22cm50Hz(1)s.4(2)a=m/s(ABBA)(3)3v3m/s(ABBA)7H196m4sHTHg9.8m/s28201g10m/s29457g10m/s2123510.3502m/s24m/s.?(g=10m/s)