棰樺彿
涓�
浜?/p>
涓?/p>
鍥?/p>
鎬诲垎
寰楀垎
涓�閫夋嫨棰橈細锛堝叡
12
灏忛锛屾瘡灏忛
2
鍒嗭紝鍏?/p>
24
鍒嗭級
1.
鐢ㄩ搧閿ゆ妸璐ㄩ噺寰堝皬鐨勯拤瀛愭暡鍏ユ湪鏉匡紝璁炬湪鏉垮閽夊瓙鐨勯樆鍔涗笌閽?
瀛愯繘鍏ユ湪鏉跨殑娣卞害鎴愭姣斻�傚湪閾侀敜鏁叉墦绗竴娆℃椂锛岃兘鎶婇拤瀛愭暡鍏?/p>
2.00cm
銆傚鏋滈搧閿ょ
浜屾鏁叉墦鐨勯�熷害涓庣涓�娆″畬鍏ㄧ浉鍚岋紝閭ｄ箞绗簩娆℃暡鍏ュ娣变负锛堬級
(A)
0.50cm
锛?/p>
(B)
0.41cm
锛?/p>
(C)
0.83cm
锛?/p>
(D)
2.00cm
銆?/p>
2.
涓�涓钩闈㈢畝璋愭尝娌?/p>
x
杞存鏂瑰悜浼犳挱锛屾尝閫熶负
u=160m/s
锛?/p>
t=0
鏃跺埢鐨勬尝褰㈠浘濡傚浘鎵�绀猴紝
鍒欒娉㈢殑琛ㄥ紡涓?/p>
()
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A
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2
4
40
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3
飦?/p>
飦?/p>
飦?/p>
飥?/p>
飥?/p>
飥?/p>
x
t
y
m
锛?/p>
锛?/p>
B
锛?/p>
)
2
4
40
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飦?
飦?
飦?/p>
飥?
飥?/p>
飥?/p>
x
t
y
m
锛?/p>
锛?/p>
C
锛?/p>
)
2
4
40
cos(
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飦?
飦?/p>
飥?/p>
飥?/p>
飥?/p>
x
t
y
m
锛?/p>
锛?/p>
D
锛?/p>
)
2
4
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飦?
飦?/p>
飦?/p>
飥?
飥?
飥?/p>
x
t
y
m
銆?/p>
3.
鍏充簬楂樻柉瀹氱悊鐨勭悊瑙ｆ湁涓嬮潰鍑犵璇存硶锛屽叾涓纭殑鏄紙锛?/p>
(A)
濡傛灉楂樻柉闈笂
E
澶勫涓洪浂锛屽垯璇ラ潰鍐呭繀鏃犵數鑽凤紱
(B)
濡傛灉楂樻柉闈㈠唴鏃犵數鑽凤紝鍒欓珮鏂潰涓?/p>
E
澶勫涓洪浂锛?/p>
(C)
濡傛灉楂樻柉闈笂
E
澶勫涓嶄负闆讹紝鍒欒闈㈠唴蹇呮棤鐢佃嵎锛?/p>
(D)
濡傛灉楂樻柉闈㈠唴鏈夊噣鐢佃嵎锛屽垯閫氳繃璇ラ潰鐨勭數閫氶噺蹇呬笉涓洪浂銆?/p>
4.
瀹瑰櫒涓偍鏈変竴瀹氶噺鐨勫浜庡钩琛＄姸鎬佺殑鐞嗘兂姘斾綋锛屾俯搴︿负
T
锛屽垎瀛愯川閲忎负
m
锛屽垯鍒嗗瓙閫?
搴﹀湪
x
鏂瑰悜鐨勫垎閲忓钩鍧囧�间负锛堟牴鎹悊鎯虫皵浣撳垎瀛愭ā鍨嬪拰缁熻鍋囪璁ㄨ锛?/p>
锛?/p>
A
锛?/p>
x
V
=0
锛涳紙
B
锛?/p>
x
V
=
m
kT
飦?/p>
3
8
锛涳紙锛?/p>
锛?/p>
C
锛?/p>
x
V
=
m
kT
2
3
锛涳紙
D
锛?/p>
x
V
=
m
kT
飦?/p>
8
3
1
锛?/p>
寰楀垎
璇勯槄浜?/p>
瀛?/p>
闄?/p>
锛?/p>
涓?/p>
涓?/p>
鐝?/p>
绾?/p>
锛?/p>
濮?/p>
鍚?/p>
锛?/p>
瀛?/p>
鍙?/p>
锛?/p>
瑁?/p>
璁?/p>
绾?/p>
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(
m
y
)
(
m
x
3
3
飥?/p>
o
4
8
u
飦?