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璐ㄧ偣杩愬姩瀛﹀涔犳潗鏂?/p>
涓�銆侀�夋嫨棰?/p>
1
锛庤川鐐规部杞ㄩ亾
AB
浣滄洸绾胯繍鍔紝閫熺巼閫愭笎鍑忓皬锛屽浘涓摢涓�绉嶆儏鍐垫纭湴琛ㄧず浜嗚川鐐瑰湪
C
澶?/p>
鐨勫姞閫熷害
?
( )
(
A
) (
B
)(
C
)(
D
)
銆愭彁绀猴細鐢变簬璐ㄧ偣浣滄洸绾胯繍鍔紝鎵�浠ワ紝鍔犻�熷害鐨勬柟鍚戞寚鍚戞洸绾跨殑鍐呬晶锛屽張閫熺巼閫愭笎鍑忓皬锛屾墍浠ュ姞閫熷害鐨勫垏
鍚戝垎閲忎笌杩愬姩鏂瑰悜鐩稿弽銆?/p>
2
锛庝竴璐ㄧ偣娌?/p>
x
杞磋繍鍔ㄧ殑瑙勫緥鏄?/p>
5
4
2
飥?/p>
飥?/p>
飥?/p>
t
t
x
锛?/p>
SI
鍒讹級
銆傚垯鍓嶄笁绉掑唴瀹冪殑
( )
(
A
)
浣嶇Щ鍜岃矾绋嬮兘鏄?/p>
3m
锛?/p>
(
B
)
浣嶇Щ鍜岃矾绋嬮兘鏄?/p>
-3m
锛?/p>
(
C
)
浣嶇Щ鏄?/p>
-3m
锛岃矾绋嬫槸
3m
锛?/p>
(
D
)
浣嶇Щ鏄?/p>
-3m
锛岃矾绋嬫槸
5m
銆?/p>
銆愭彁绀猴細灏?/p>
t
=3
浠ｅ叆鍏紡锛屽緱鍒扮殑鏄?/p>
t=3
鏃剁殑浣嶇疆锛屼綅绉讳负
t
=3
鏃剁殑浣嶇疆鍑忓幓
t
=0
鏃剁殑浣嶇疆锛涙樉鐒惰繍鍔ㄨ寰?/p>
鏄竴涓姏鐗╃嚎鏂圭▼锛屽彲鍒╃敤姹傚鎵惧嚭鏋佸�肩偣锛?
2
4
d
x
t
dt
飥?/p>
飥?/p>
锛屽綋
t
=2
鏃讹紝閫熷害
0
d
x
dt
飦?/p>
飥?/p>
飥?/p>
锛屾墍浠ュ墠涓ょ閫�
浜?/p>
4M
锛屽悗涓�绉掕繘浜?/p>
1M
锛岃矾绋嬩负
5M
銆?/p>
3
锛?/p>
涓�璐ㄧ偣鐨勮繍鍔ㄦ柟绋嬫槸
cos
sin
r
R
t
i
R
t
j
飦?/p>
飦?/p>
飥?/p>
飥?/p>
锛?/p>
R
銆?/p>
飦?/p>
涓烘甯告暟銆?/p>
浠?/p>
t
锛?/p>
飦?/p>
飦?/p>
/
鍒?/p>
t
=
飦?
飦?/p>
/
2
鏃堕棿鍐?/p>
(
1
)
璇ヨ川鐐圭殑浣嶇Щ鏄?/p>
( )
(
A
)
-2
R
i
飦?/p>
锛?/p>
(
B
)
2
R
i
飦?
锛?/p>
(
C
)
-2
j
飦?/p>
锛?/p>
(
D
)
0
銆?/p>
(
2
)
璇ヨ川鐐圭粡杩囩殑璺▼鏄?/p>
( )
(
A
)
2
R
锛?/p>
(
B
)
R
飦?/p>
锛?/p>
(
C
)
0
锛?/p>
(
D
)
R
飦?/p>
飦?/p>
銆?/p>
銆愭彁绀猴細杞ㄩ亾鏂圭▼鏄竴涓渾鍛ㄦ柟绋嬶紙鐢辫繍鍔ㄦ柟绋嬪钩鏂圭浉鍔犲彲寰楀渾鏂圭▼锛?/p>
锛?/p>
t
锛?/p>
蟺/蠅
鍒?/p>
t
锛?/p>
2
蟺/蠅
鏃堕棿鍐呰川鐐规部鍦?/p>
鍛ㄨ窇浜嗗崐鍦堬紝浣嶇Щ涓虹洿寰勶紝璺▼鍗婂懆闀裤�?/p>
4
锛庝竴缁嗙洿鏉?/p>
AB
锛岀珫鐩撮潬鍦ㄥ澹佷笂锛?/p>
B
绔部姘村钩鏂瑰悜浠ラ�熷害
飦?/p>
婊戠澧欏锛屽垯褰撶粏鏉嗚繍鍔ㄥ埌鍥剧ず浣嶇疆鏃讹紝缁?/p>
鏉嗕腑鐐?/p>
C
鐨勯�熷害
( )
(
A
)
澶у皬涓?
2
飦?
锛屾柟鍚戜笌
B
绔繍鍔ㄦ柟鍚戠浉鍚岋紱
(
B
)
澶у皬涓?/p>
2
飦?
锛屾柟鍚戜笌
A
绔繍鍔ㄦ柟鍚戠浉鍚岋紱
(
C
)
澶у皬涓?/p>
2
飦?
锛屾柟鍚戞部鏉嗚韩鏂瑰悜锛?/p>
飦?
A
C
B
v
飦?/p>
a
飦?/p>
C
A
B
a
飦?
C
A
B
a
飦?/p>
C
A
B
a
飦?/p>
C
A
B