.
..
2018
骞存櫘閫氶珮绛夊鏍℃嫑鐢熷叏鍥界粺涓�鑰冭瘯
鍏ㄥ浗
2
鍗?/p>
鐞嗙缁煎悎鑳藉姏娴嬭瘯璇曢鍗风墿鐞嗛儴鍒?/p>
姹熻嫃鐪佽祫娣辩壒绾ф暀甯?/p>
鎴村剴浜В鏋?/p>
浜屻�?/p>
閫夋嫨棰橈細
鏈鍏?/p>
8
灏忛锛?/p>
姣忓皬棰?/p>
6
鍒嗭紝
鍏?/p>
48
鍒嗐�傚湪姣忓皬棰樼粰鍑虹殑鍥涗釜閫夐」涓紝绗?/p>
14~18
棰樺彧鏈変竴椤圭鍚堥鐩姹傦紝
绗?/p>
19~21
棰樻湁澶氶」绗﹀悎棰樼洰瑕佹眰銆?/p>
鍏ㄩ儴閫夊鐨勫緱
6
鍒嗭紝
閫夊
浣嗕笉鍏ㄧ殑寰?/p>
3
鍒嗭紝鏈夐�夐敊鐨勫緱
0
鍒嗐�傚绉?/p>
&
缃?/p>
14
锛庡鍥撅紝鏌愬悓瀛︾敤缁冲瓙鎷夊姩鏈ㄧ锛屼娇瀹冧粠闈欐寮�濮嬫部绮楃硻姘村钩璺潰杩愬姩鑷冲叿鏈夋煇涓�閫?
搴︼紝鏈ㄧ鑾峰緱鐨勫姩鑳戒竴瀹?/p>
A
锛庡皬浜庢媺鍔涙墍鍋氱殑鍔?/p>
B
锛庣瓑浜庢媺鍔涙墍鍋氱殑鍔?/p>
C
锛庣瓑浜庡厠鏈嶆懇鎿﹀姏鎵�鍋氱殑鍔?/p>
D
锛庡ぇ浜庡厠鏈嶆懇鎿﹀姏鎵�鍋氱殑鍔?/p>
銆愯В鏋愩�戞牴鎹姩鑳藉畾鐞嗘湪绠辫幏寰楃殑鍔ㄨ兘涓�瀹氭媺鍔涙墍鍋氱殑鍔熷噺鍘诲厠鏈嶆懇鎿﹀姏鎵�鍋氱殑鍔熴�?/p>
銆愮瓟妗堛�?/p>
14
锛?/p>
A
15
锛庨珮绌哄潬鐗╂瀬鏄撳琛屼汉閫犳垚浼ゅ銆傝嫢涓�涓?/p>
50 g
鐨勯浮铔嬩粠涓�灞呮皯妤肩殑
25
灞傚潬涓嬶紝涓庡湴
闈㈢殑鎾炲嚮鏃堕棿绾︿负
2 ms
锛屽垯璇ラ浮铔嬪鍦伴潰浜х敓鐨勫啿鍑诲姏绾︿负
A
锛?/p>
10 N
B
锛?/p>
10
2
N
C
锛?/p>
10
3
N
D
锛?/p>
10
4
N
銆愯В鏋愩�戣
m
h
50
飥?/p>
锛屾牴鎹姩鑳藉畾鐞?/p>
2
2
1
mv
mgh
飥?
鍜屽姩閲忓畾鐞?/p>
t
mv
mg
F
飦?/p>
飥?
飥?/p>
瑙ｅ緱
飥?/p>
F
N
3
10
5
3
飩?/p>
銆愮瓟妗堛�?/p>
15
锛?/p>
C
16
锛?/p>
2018
骞?/p>
2
鏈堬紝鎴戝浗
500 m
鍙ｅ緞灏勭數鏈涜繙闀滐紙澶╃溂锛夊彂鐜版绉掕剦鍐叉槦鈥淛0318+0253鈥濓紝
鍏惰嚜杞懆鏈?/p>
T
=5.19 ms
锛屽亣璁炬槦浣撲负璐ㄩ噺鍧囧寑鍒嗗竷鐨勭悆浣擄紝宸茬煡涓囨湁寮曞姏甯搁噺涓?
11
2
2
6.67
10
N
m
/
kg
飥?/p>
飩?/p>
飪?/p>
銆備互鍛ㄦ湡
T
绋冲畾鑷浆鐨勬槦浣撶殑瀵嗗害鏈�灏忓�肩害涓?/p>
A
锛?/p>
9
3
5
10
kg
/
m
飩?/p>
B
锛?/p>
12
3
5
10
kg
/
m
飩?/p>