1重力静止2重力初速度匀加速直线自由落体打点计时器3重力向下9.8 m/s210 m/s2gt2gs45答案BC6D 78答案B9C 1011图 112平均s/m(EF)0.017 3(DE)0.013 4(CD)0.009 6(BC)0.005 8(AB)0.001 9/s/m/0.003 90.003 80.003 80.003 90.003 85a/(ms2)/9.6313答案见解析1415161718答案 0.5 s35 m 1920答案AC2122答案CD23图 2D 24D 25B26A 27A 28答案0.15 s29答案0.5 s
