寮犲娓競濉樻ˉ楂樼骇涓
2019
瀛﹀勾绗竴瀛︽湡
楂樹竴骞寸骇鐗╃悊鏈熸湯璇曞嵎
鐝骇
濮撳悕
鏈瘯鍗峰垎绗?/p>
鈪?/p>
鍗凤紙閫夋嫨棰橈級鍜岀
鈪?/p>
鍗凤紙闈為�夋嫨棰橈級涓ゅ嵎锛屾弧鍒?/p>
120
鍒嗭紝鑰冭瘯鏃堕棿
90
鍒?/p>
閽熴�?/p>
涓�銆佸崟椤归�夋嫨棰橈紙鏈鍖呮嫭
5
灏忛锛屾瘡灏忛
3
鍒?/p>
,
鍏?/p>
31
鍒嗐�傛瘡灏忛鍙湁涓�涓?/p>
锛庯紟锛庯紟
閫夐」绗﹀悎棰樻剰锛?/p>
1
锛庝笅鍒楃墿浣撴垨浜猴紝鍙互鐪嬩綔璐ㄧ偣鐨勬槸
(
)
鈶犵爺绌惰烦姘村啝鍐涢儹鏅舵櫠鍦ㄨ烦姘存瘮璧涗腑鐨勭┖涓Э鎬?/p>
鈶＄爺绌舵垜鍥界瀛﹁�冨療鑸瑰幓鍗楁瀬閫斾腑
鈶㈢爺绌朵竴鍒楃伀杞﹂�氳繃鏌愯矾鍙ｆ墍鐢ㄧ殑鏃堕棿
鈶ｇ爺绌?/p>
2019
骞?/p>
鈥?0
骞村浗搴嗗ぇ闃呭叺
鈥?/p>
涓鏈洪琛岀殑璺嚎
鈶ょ爺绌?/p>
2019
骞?/p>
鈥?0
骞村浗搴嗗ぇ闃呭叺
鈥?/p>
涓鏈虹殑椋炶濮挎�?/p>
A
锛庘憼鈶?/p>
B
锛庘憽鈶?/p>
C
锛庘憼鈶?/p>
D
锛庘憽鈶?/p>
2
锛?/p>
涓�璐ㄧ偣娌跨洿绾?/p>
Ox
鏂瑰悜鍋氬姞閫熻繍鍔紝
瀹冪寮�
O
鐐圭殑璺濈闅忔椂闂村彉鍖栫殑鍏崇郴涓?/p>
3
2
t
a
x
飥?/p>
飥?/p>
锛?/p>
m
锛?/p>
锛堝叾涓?/p>
a
涓轰竴涓父鏁帮級
锛屽畠鐨勯�熷害闅忔椂闂村彉鍖栫殑鍏崇郴涓?/p>
2
6
t
v
飥?/p>
锛?/p>
m/s
锛?/p>
銆傚垯璇ヨ川鐐瑰湪
t
=2 s
鏃剁殑
鐬椂閫熷害鍜?/p>
t
=0s
鍒?/p>
t
=2s
闂寸殑骞冲潎閫熷害鍒嗗埆涓?/p>
锛?/p>
锛?/p>
A
锛?/p>
8 m/s
锛?/p>
24 m/s
B
锛?/p>
24 m/s
锛?/p>
8 m/s
C
锛?/p>
12 m/s
锛?/p>
24 m/s
D
锛?/p>
24 m/s
锛?/p>
12 m/s
3
锛庣墿鍧?/p>
A
1
銆?/p>
A
2
銆?/p>
B
1
鍜?/p>
B
2
鐨勮川閲忓潎涓?/p>
m
锛?/p>
A
1
銆?/p>
A
2
鐢ㄥ垰鎬ц交鏉嗚繛鎺ワ紝
B
1
銆?/p>
B
2
鐢ㄨ交璐ㄥ脊绨ц繛缁撱�?/p>
涓や釜瑁呯疆閮芥斁鍦ㄦ按骞崇殑鏀墭鐗╀笂锛屽浜庡钩琛＄姸鎬侊紝
濡傚浘鎵�绀恒�?/p>
浠婄獊鐒惰繀閫熷湴鎾ゅ幓鏀墭鐗╋紝璁?/p>
鐗╁潡涓嬭惤銆傚湪闄ゅ幓鏀墭鐗╃殑鐬棿锛?/p>
A
1
銆?/p>
A
2
鍙楀埌鐨勫悎鍔涘垎鍒负
f
1
鍜?/p>
f
2
锛?
B
1
銆?/p>
B
2
鍙楀埌鐨勫悎鍔涘垎鍒负
F
1
鍜?/p>
F
2
銆傚垯
锛?/p>
锛?/p>
锛?/p>
锛?/p>
A
锛?/p>
f
1
=0
锛?/p>
f
2
=2
mg
锛?/p>
F
1
=0
锛?/p>
F
2
=2
mg
B
锛?/p>
f
1
=
mg
锛?/p>
f
2
=
mg
锛?/p>
F
1
=0
锛?/p>
F
2
=2
mg
C
锛?/p>
f
1
=0
锛?/p>
f
2
=2mg
锛?/p>
F
1
=
mg
锛?/p>
F
2
=mg
D
锛?/p>
f
1
=
mg
锛?/p>
f
2
=
mg
锛?/p>
F
1
=
mg
锛?/p>
F
2
=
mg
4
锛庢湪鍧?/p>
A
銆?/p>
B
鍒嗗埆閲?/p>
50N
鍜?/p>
60N
锛?/p>
瀹冧滑涓庢按骞冲湴闈箣闂寸殑鍔ㄦ懇鎿﹀洜鏁板潎涓?
0.25
锛屽す鍦?/p>
A
銆?/p>
B
涔嬮棿鐨勮交寮圭哀鍘嬬缉浜?/p>
2cm
锛屽脊绨х殑鍔插害绯绘暟涓?/p>
400N/m.
绯荤粺缃簬姘村钩鍦伴潰涓婇潤姝?/p>
涓嶅姩锛庣幇鐢?/p>
F=1N
鐨勬按骞虫媺鍔涗綔鐢ㄥ湪鏈ㄥ潡
B
涓婏紝濡傚浘鎵�绀猴紝鍔?/p>
F
浣滅敤鍚?/p>
锛?/p>
锛?/p>
A
锛庢湪鍧?/p>
A
鎵�鍙楁懇鎿﹀姏澶у皬鏄?/p>
12.5N
B
锛庢湪鍧?/p>
A
鎵�鍙楁懇鎿﹀姏澶у皬
鏄?/p>
11.5N
C
锛庢湪鍧?/p>
B
鎵�鍙楁懇鎿﹀姏澶у皬鏄?/p>
9N
D
锛庢湪鍧?/p>
B
鎵�鍙楁懇鎿﹀姏澶у皬鏄?/p>
7N
5
锛庡鍥炬墍绀猴紝鐗╀綋
A
銆?/p>
B
鏀惧湪鐗╀綋
C
涓婏紝姘村钩鍔?/p>
F
浣滅敤浜?/p>
A
锛屼娇
A
銆?/p>
B
銆?/p>
C
涓�璧峰寑閫熻繍鍔紝鍚勬帴瑙﹂潰闂寸殑鎽╂摝鍔涚殑鎯呭喌鏄?/p>
锛?/p>
锛?/p>
A
锛?/p>
A
瀵?/p>
C
鏈夊悜宸︾殑鎽╂摝鍔?/p>
B
锛?/p>
C
瀵?/p>
B
鏈夊悜宸︾殑鎽╂摝鍔?/p>
C
锛?/p>
鐗╀綋
C
鍙楀埌涓変釜鎽╂摝鍔涚殑浣滅敤
D
锛?/p>
C
瀵瑰湴鏈夊悜鍙崇殑鎽╂摝鍔?/p>
浜屻�佸椤归�夋嫨棰橈紙姣忓皬棰樼粰鍑虹殑鍥涗釜閫夐」涓紝鏈夊涓�夐」
锛庯紟锛庯紟
姝ｇ‘锛屽叏閮ㄩ�夊鐨勫緱
4
鍒嗭紝閫夊
浣嗕笉鍏ㄧ殑寰?/p>
2
鍒嗭紝鏈夐�夐敊鐨勫緱
0
鍒嗐�傚叡
4
灏忛
16
鍒嗭級
6
锛庣墿浣撴部涓�鐩寸嚎杩愬姩锛屽畠鍦ㄤ腑闂翠綅缃鐨勯�熷害涓?/p>
1
v
锛屽湪涓棿鏃跺埢鐨勯�熷害涓?/p>
2
v
锛屽垯浠ヤ笅璇存硶
姝ｇ‘鐨勬槸锛?/p>
锛?/p>
A
锛庡綋鐗╀綋鍋氬寑鍔犻�熺洿绾胯繍鍔ㄦ椂
2
1
v
v
飥?/p>
B
锛庡綋鐗╀綋鍋氬寑鍑忛�熺洿绾胯繍鍔ㄦ椂
2
1
v
v
飥?/p>
C
锛庡綋鐗╀綋鍋氬寑鍔犻�熺洿绾胯繍鍔ㄦ椂
2
1
v
v
飥?/p>
D
锛庡綋鐗╀綋鍋氬寑鍑忛�熺洿绾胯繍鍔ㄦ椂
2
1
v
v
飥?/p>
A
1
A
2
B
1
B
2