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1, abc, (a>b>c), A B .: (1)_______(2) _______.

2, , A C , B ,, AC=100m,BC=30m, , , . 3, 150m , 300m ,,, 200m, m, m. 4, x ,ˡ: t /s x /m 2 0 4 - 1 - 7 - 6 0 1 2 3 4 5

(1) x . (2) 02s ˧ ____, _______ . (3)____ s . (4) ___s , ____,

__________. 5, ا? ? (1) 790m/s __________ (2) 72km/h__________ (3) 80km/h__________ (4) l02m/s__________ (5) 36m/s __________ 6, ,,, ,,__________; ,__________;, __________. 7, ,,. ,__________,__________. ,__________,__________. 8, ,. 1 ; 2 .

9, , ,. ,, , , . (,,,) 10, , , , ,

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1,,,,, ,,, ( ) A.,, B.,, C.,, D.,,,, 2,, R A C, ˡ ( ) A. 4R,2R B.4R ,2R C.R ,4R D.4R ,2R 3, ˡ, ( ) A.˧, B., C., D. 4, , ?( ) A. C. B. D.

5,, ,,, ( ) A. B. C. D. ,, 6,:, .,( )

A. C.

B. D.

7,֧, A,B ,( ) A. B. C.A ,B D.A ,B 8,, ( ( ) ) )

:"," ( ( A, C, ) B, D, )

9,( ; ; ; ; ""; A , C , B, D,

10,,(

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1, 100m , 5s 9m/s,10s 10.2 m/s,: 2,, v1, v2, v ; v1, v2, v (v 1v2) ,; ,.


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1,
a 2 + (b + c) 2

a 2 + b2 + c 2

2,130m;70m;AB 3,200;400 4,6m;X ;4;5;13;X 5,,,,, 6,;; 7,;;; 8,;, 9,;; 10,

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1,BC 2,D 3,B 4,C 5,D 6,B 7,D 8,B;A;D;B 9,C 10,B

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1,10m/s 2, 2v v v = 1 2 v1 + v2

v =

v1 + v2 2

v <v


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