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1
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1
s
鍐呭拰绗?/p>
2
s
鍐呬綅绉诲ぇ灏忎緷娆′负
9 m
鍜?/p>
7 m
锛屽垯鍒硅溅鍚?/p>
6 s
鍐呯殑浣嶇Щ鏄?/p>
(
)
A
锛?/p>
20 m
B
锛?/p>
24 m
C
锛?/p>
25 m
D
锛?/p>
75 m
绛旀锛?/p>
C
瑙ｆ瀽锛?/p>
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s
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at
2
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a
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s
t
2
锛?/p>
2 m/s
2
锛涗粠寮�濮嬪埞杞﹁鏃讹紝
1 s
鏃剁殑閫?
搴︿负
v
1
锛?/p>
9
锛?/p>
7
2
m/s
2
锛?/p>
8 m/s
锛屽啀缁忚繃
4 s
姹借溅鍋滄杩愬姩锛屾墍浠ユ苯杞︾殑鎬诲埞杞︽椂闂存槸
5 s
锛屽埞
杞﹀悗
6 s
鍐呯殑浣嶇Щ
s
锛?/p>
1
2
at
2
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1
2
脳2脳5
2
m
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25 m
锛庢湰棰樼瓟妗堜负
C
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2
锛庝竴涓墿浣撳仛鍙樺姞閫熺洿绾胯繍鍔紝渚濇缁忚繃
A
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C
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B
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AC
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AB
娈电殑鍔犻�熷害鎭掍负
a
1
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a
2
锛屽凡鐭ョ墿浣撶粡杩?/p>
A
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B
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C
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v
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v
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v
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v
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v
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v
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v
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a
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a
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A
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a
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a
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a
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a
1
>
a
2
D
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绛旀锛?/p>
A
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v
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t
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v
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v
A
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v
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v
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v
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v
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v
B
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a
1
t
AB
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a
2
t
BC
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t
AB
>
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a
1
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a
2
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A
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t
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v
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v
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v
C
2
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a
1
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a
2
.
3
锛庝竴杈嗘苯杞︽鍦ㄤ互閫熷害
54 km/h
鍖�閫熻繍鍔紝鐢变簬鏌愮鍘熷洜闇�瑕佸湪
100 m
鍐呭仠涓嬶紝鍒欏埞
杞﹀姞閫熷害澶у皬涓嶅彲鑳戒负
(
)
A
锛?/p>
1.06 m/s
2
B
锛?/p>
1.65 m/s
2
C
锛?/p>
2.4 m/s
2
D
锛?/p>
3.2 m/s
2
绛旀锛?/p>
A
瑙ｆ瀽锛?/p>
鍒硅溅鍒濋�熷害涓?/p>
v
0
锛?/p>
54 km/h
锛?/p>
15 m/s
銆佹湯閫熷害涓?/p>
v
锛?/p>
0
锛岃鍔犻�熷害澶у皬
涓?/p>
a
锛屽簲鐢ㄩ�熷害鈥斾綅绉诲叧绯诲紡鏈?/p>
v
2
锛?/p>
v
2
0
锛濓紞
2
ax
锛岃В寰?/p>
a
锛?/p>
1.125 m/s
2
锛屽垯鍔犻�熷害澶у皬鍒嗗埆涓?/p>
3.2
m/s
2
銆?/p>
2.4
m/s
2
銆?/p>
1.65
m/s
2
鏃舵苯杞﹀湪
100
m
鍐呰兘鍋滀笅锛岄�夐」
B
銆?/p>
C
銆?/p>
D
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A
閿欙紟
4
锛?/p>
(
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)
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v
0
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g
2
锛屽綋
婊戝潡閫熷害澶у皬鍙樹负
v
0
2
鏃讹紝鎵�鐢ㄦ椂闂村彲鑳芥槸
(
)