m

μ = 0

μ = m 2

μ = m

z

z1

time/s

z

z1

time/s

z

z1

time/s

8

73,541

44,978

54

36,863

81,656

57

15,598

102,921

53

9

77,901

54,175

70

37,835

94,241

124

13,150

118,926

144

10

81,488

61,789

73

37,340

105,937

141

9158

134,119

283

11

84,608

70,084

152

37,433

117,259

194

4131

150,561

230

12

89,063

74,499

220

36,589

126,973

197

−651

164,213

433

13

91,288

79,870

223

29,452

141,706

350

−7779

178,937

437