鎻槼甯?/p>
2019
骞撮珮涓瘯涓氱彮楂樿�冪浜屾妯℃嫙鑰冭瘯
鐞?/p>
绉?/p>
缁?/p>
鍚?/p>
鏈瘯鍗峰垎鍗曢」閫夋嫨棰樸�佸椤归�夋嫨棰樺拰闈為�夋嫨棰樹笁涓儴鍒嗐�傛弧鍒?/p>
300
鍒嗐�傝�冭瘯鏃堕棿
150
鍒嗛挓銆?/p>
浜屻�侀�夋嫨棰橈細鏈鍏?/p>
8
灏忛锛屾瘡灏忛
6
鍒嗐�傚湪姣忓皬棰樼粰鍑虹殑鍥涗釜閫夐」涓紝绗?/p>
14
锝?/p>
18
棰樺彧鏈変竴椤圭鍚?
棰樼洰瑕佹眰锛岀
19
锝?/p>
21
棰樻湁澶氶」绗﹀悎棰樼洰瑕佹眰銆傚叏閮ㄩ�夊鐨勫緱
6
鍒嗭紝閫夊浣嗕笉鍏ㄧ殑寰?/p>
3
鍒嗭紝鏈夐�?/p>
閿欑殑寰?/p>
0
鍒嗐�?/p>
14
锛庤交鏍歌仛鍙樺叾涓殑涓�涓弽搴旀柟绋嬫槸锛?/p>
x
He
H
H
飥?/p>
飩?/p>
飥?/p>
4
2
3
1
2
1
銆傝嫢宸茬煡
H
2
1
鐨勮川閲忎负
m
1
锛?/p>
H
3
1
鐨勮川
閲忎负
m
2
锛?/p>
He
4
2
鐨勮川閲忎负
m
3
锛?/p>
x
鐨勮川閲忎负
m
4
锛屽垯涓嬪垪璇存硶涓纭殑鏄細
A
锛?/p>
H
2
1
鍜?/p>
H
3
1
鍦ㄥ父娓╀笅灏辫兘澶熷彂鐢熻仛鍙?/p>
B
锛?/p>
x
鏄川瀛?/p>
C
锛庤繖涓弽搴旈噴鏀剧殑鏍歌兘涓?/p>
螖
E
=(
m
1
+
m
2
-
m
3
-
m
4
)
c
2
D
锛庢垜鍥戒竴閮ㄥ垎鏍哥數绔欏氨鏄埄鐢ㄨ交鏍哥殑鑱氬彉閲婃斁鐨勮兘閲忔潵鍙戠數鐨?/p>
15
锛庣憺澹樋灏斿崙鏂北鐨勫姵鐗瑰竷浼﹀璺充紴鍖烘槸鍏ㄧ悆鏈�缇庣殑璺充紴鍦颁箣涓�锛屾瘡涓�骞撮兘鍚稿紩浜嗘棤鏁拌烦浼炵埍濂借�?/p>
姹囪仛姝ゅ湴銆傛煇鏃ヤ竴璺充紴鐖卞ソ鑰呬互
5m/s
鐨勯�熷害绔栫洿鍖�閫熼檷钀斤紝鍦ㄧ鍦伴潰
h
=10m
鐨勫湴鏂规帀浜嗕竴棰楁墸瀛愶紝
鍒欒烦浼炶繍鍔ㄥ憳姣旀墸瀛愭櫄鐫�闄嗙殑鏃堕棿涓猴紙鎵ｅ瓙鍙楀埌鐨勭┖姘旈樆鍔涘彲蹇界暐锛?/p>
g
鍙?/p>
10m/s
2
锛?/p>
A
锛?/p>
2 s
B
锛?/p>
2
s
C
锛?/p>
1 s
D
锛?/p>
飥?/p>
飥?
2
2
飥?/p>
s
16
锛庡湪鍗敓澶ф壂闄や腑锛屾煇鍚屽鐢ㄦ嫋鎶婃嫋鍦帮紝娌挎帹鏉嗘柟鍚戝鎷?/p>
鎶婃柦鍔犳帹鍔?/p>
F
锛屽鍥炬墍绀猴紝姝ゆ椂鎺ㄥ姏涓庢按骞虫柟鍚戠殑澶硅涓?/p>
胃
锛?/p>
涓旀嫋鎶婂垰濂藉仛鍖�閫熺洿绾胯繍鍔ㄣ�備粠鏌愭椂鍒诲紑濮嬩繚鎸佸姏
F
鐨勫ぇ灏?/p>
涓嶅彉锛屽噺灏?/p>
F
涓庢按骞虫柟鍚戠殑澶硅
胃
锛屽垯
A
锛庢嫋鎶婂皢鍋氬噺閫熻繍鍔?/p>
B
锛庢嫋鎶婄户缁仛鍖�閫熻繍鍔?/p>
C
锛庡湴闈㈠鎷栨妸鐨勬敮鎸佸姏
F
N
鍙樺皬
D
锛庤嫢鍑忓皬
胃
鐨勫悓鏃跺噺灏?/p>
F
锛屾嫋鎶婁竴瀹氬仛鍔犻�熻繍鍔?/p>
17
锛庡鍥炬墍绀猴紝
MN
鏄煇鍖�寮虹數鍦轰腑鐨勪竴鏉＄數鍦虹嚎銆備竴甯︽鐢电矑瀛愬皠鍏ョ數鍦哄悗锛屼粎鍦ㄧ數鍦哄姏浣滅敤涓嬫部
杞ㄨ抗
ABC
杩愬姩銆備笅鍒楄娉曚腑姝ｇ‘鐨勬槸
A
锛庣矑瀛愬湪
A
鐐圭殑鍔犻�熷害姣斿湪
C
鐐圭殑鍔犻�熷害澶?/p>
B
锛庣矑瀛愬湪
A
鐐圭殑鐢靛娍鑳芥瘮鍦?/p>
C
鐐圭殑鐢靛娍鑳藉皬
C
锛?/p>
M
銆?/p>
N
涓ょ偣鐨勭數鍔匡細
N
M
飦?/p>
飦?/p>
飥?/p>
D
锛庣數鍦虹嚎鐨勬柟鍚戞按骞冲悜鍙?/p>
18
锛庡鍥炬墍绀猴紝涓�鍏夋粦缁嗘潌鍥哄畾鍦ㄦ按骞抽潰涓婄殑
C
鐐癸紝缁嗘潌涓庢按骞抽潰鐨勫す瑙?/p>
涓?/p>
30掳
锛屼竴鍘熼暱涓?/p>
L
鐨勮交璐ㄥ脊鎬х怀锛屼笅绔浐瀹氬湪姘村钩闈笂鐨?/p>
B
鐐癸紝涓婄涓?
M
N
A
B
C