... M 1 2 31 2 3N 1 2 3 12 213131x 15mm 17,85i 13,39i 11,9iN 44;N 33;N 29 x 20 mm 26 ,19i 19,64i 17,46ik4 8 16 20 k 3 6 12 15k3 6 9k 2 4 60 12 240 9 180 12 08 ... 7: 2 . A. 1cm/s. B. 0,9 cm/s. C. 1 ,2 cm/s. D. 0,8cm/s. 22 C1 c 1 1 22 C1 2 c 1 2 1 2 CC1 1 2 136cmax C 22 1 ... 39: A. 2 7cm/s3. B. 2 3cm/s3. C. 2 5cm/s3 D. 2 cm/s 002s 4 s 2cm Khi 2 2 2 2 2 00 2 vs S v S s...