1
鎸姩涓庢尝鍔ㄩ搴?/p>
涓�銆侀�夋嫨棰橈紙姣忛
3
鍒嗭級
1
銆佸綋璐ㄧ偣浠ラ鐜?/p>
谓
浣滅畝璋愭尟鍔ㄦ椂锛屽畠鐨勫姩鑳界殑鍙樺寲棰戠巼涓猴紙
锛?/p>
锛?/p>
A
锛?/p>
2
v
锛?/p>
B
锛?/p>
v
锛?/p>
C
锛?/p>
v
2
锛?/p>
D
锛?/p>
v
4
2
銆佷竴璐ㄧ偣娌?/p>
x
杞翠綔绠�璋愭尟鍔紝鎸箙涓?/p>
cm
12
锛屽懆鏈熶负
s
2
銆傚綋
0
飥?/p>
t
鏃?/p>
,
浣嶇Щ涓?/p>
cm
6
锛屼笖鍚?/p>
x
杞存鏂瑰悜
杩愬姩銆傚垯鎸姩琛ㄨ揪寮忎负锛?/p>
锛?/p>
(A)
锛?/p>
锛?/p>
3
cos
12
.
0
飦?
飦?/p>
飥?/p>
飥?/p>
t
x
锛?/p>
B
锛?
锛?/p>
锛?/p>
3
cos
12
.
0
飦?
飦?/p>
飥?/p>
飥?/p>
t
x
锛?/p>
C
锛?
锛?/p>
锛?/p>
3
2
cos
12
.
0
飦?
飦?/p>
飥?/p>
飥?/p>
t
x
锛?/p>
D
锛?
锛?
锛?/p>
3
2
cos
12
.
0
飦?
飦?/p>
飥?/p>
飥?/p>
t
x
3
銆?/p>
鏈変竴寮圭哀鎸瓙锛?/p>
鎬昏兘閲忎负
E
锛?/p>
濡傛灉绠�璋愭尟鍔ㄧ殑鎸箙澧炲姞涓哄師鏉ョ殑涓ゅ�嶏紝
閲嶇墿鐨勮川閲忓鍔犱负鍘熸潵鐨?/p>
鍥涘�嶏紝鍒欏畠鐨勬�昏兘閲忓彉涓?/p>
锛?/p>
锛?/p>
锛?/p>
A
锛?/p>
2E
锛?/p>
B
锛?/p>
4E
锛?/p>
C
锛?/p>
E /2
锛?/p>
D
锛?/p>
E /4
4
銆佹満姊版尝鐨勮〃杈惧紡涓?/p>
飥?/p>
飥╋�?/p>
飥?/p>
m
蟺
06
.
0
蟺
6
cos
05
.
0
x
t
y
飥?/p>
飥?/p>
锛屽垯
锛?/p>
锛?/p>
锛堬肌锛?/p>
娉㈤暱涓?/p>
100
锝?/p>
锛堬饥锛?/p>
娉㈤�熶负
10
锝?/p>
路
锝?/p>
-1
锛堬迹锛?/p>
鍛ㄦ湡涓?/p>
1/3
锝?/p>
锛堬激锛?/p>
娉㈡部
x
杞存鏂瑰悜浼犳挱
5
銆?/p>
涓ゅ垎鎸姩鏂圭▼鍒嗗埆涓?/p>
x
1
=3cos
(50蟺t+蟺/4)
銕?/p>
鍜?/p>
x
2
=4cos
(50蟺t+
3
蟺/4)
銕濓紝
鍒欏畠浠殑鍚堟尟鍔ㄧ殑鎸箙涓?/p>
锛?/p>
锛?/p>
(A) 1
銕?/p>
锛?/p>
B
锛?/p>
3
銕?/p>
锛?/p>
C
锛?/p>
5
銕?/p>
锛?/p>
D
锛?/p>
7
銕?/p>
6
銆佷竴骞抽潰绠�璋愭尝锛屾尝閫熶负
飦?/p>
=5 cm/s
锛岃
t= 3 s
鏃跺埢鐨?/p>
娉㈠舰濡傚浘鎵�绀猴紝鍒?/p>
x=0
澶勭殑璐ㄧ偣鐨勬尟鍔ㄦ柟绋嬩负
锛?/p>
锛?/p>
(A)
y=2脳
10
锛?
2
cos (蟺t/2
锛?/p>
蟺/2)
(
m)
(B)
y=2脳
10
锛?
2
cos (蟺t + 蟺)
(m)
(C)
y=2脳
10
锛?
2
cos(蟺t/2+蟺/2)
(
m)
(D)
y=2脳
10
锛?
2
cos (蟺t
锛?/p>
3蟺/2)
(
m)
7
銆?/p>
涓�骞抽潰绠�璋愭尝锛?/p>
娌?/p>
X
杞磋礋鏂瑰悜
浼犳挱銆?/p>
x=0
澶勭殑璐ㄧ偣
鐨勬尟鍔ㄦ洸绾垮鍥炬墍绀猴紝鑻ユ尝鍑芥暟鐢ㄤ綑寮﹀嚱鏁拌〃绀猴紝鍒欒娉?/p>
鐨勫垵浣嶇浉涓猴紙
锛?/p>
锛?/p>
A
锛?/p>
0
锛?/p>
B
锛?/p>
蟺
(C) 蟺 /2
(D)
锛?/p>
蟺
/2
8
銆佹湁涓�鍗曟憜锛屾憜闀?/p>
m
0
1
飥?/p>
l
锛屽皬鐞冭川閲?/p>
g
100
飥?/p>
m
銆傝灏忕悆鐨勮繍鍔ㄥ彲鐪嬩綔绛掕皭鎸姩锛屽垯璇ユ尟鍔ㄧ殑鍛ㄦ湡涓?/p>
锛?/p>
锛?/p>
(A)
2
飦?/p>
锛?/p>
B
锛?/p>
3
2
飦?
锛?/p>
C
锛?/p>
10
2
飦?/p>
锛?/p>
D
锛?/p>
5
2
飦?/p>
9
銆佷竴寮圭哀鎸瓙鍦ㄥ厜婊戠殑姘村钩闈笂鍋氱畝璋愭尟鍔ㄦ椂锛屽脊鎬у姏鍦ㄥ崐涓懆鏈熷唴鎵�鍋氱殑鍔熶负
[
]
(A) kA
2
锛?/p>
B
锛?/p>
kA
2
/2
锛?/p>
C
锛?/p>
kA
2
/4
锛?/p>
D
锛?/p>
0