4.3
鐗涢】绗簩瀹氬緥
缁冧範棰?/p>
(
缁忓吀濂介
)
姝ｄ氦鍒嗚В娉?/p>
1
锛?/p>
渚?/p>
.
1
锛庡鍥?/p>
5
鎵�绀猴細涓変釜鍏辩偣鍔涳紝
F
1
=5N
锛?/p>
F
2
=10N
锛?/p>
F
3
=15N
锛?
胃
=60
掳锛屽畠浠殑鍚堝姏鐨?/p>
x
杞存柟鍚戠殑鍒嗛噺
F
x
涓?/p>
________N
锛?/p>
y
杞存柟鍚戠殑鍒嗛噺
F
y
涓?/p>
N
锛屽悎鍔涚殑
澶у皬涓?/p>
N
锛屽悎鍔涙柟鍚戜笌
x
杞存鏂瑰悜澶硅
涓?/p>
銆?/p>
12. (8
鍒?/p>
)
濡傚浘
6
鎵�绀猴紝
胃
锛?/p>
37
0
锛?/p>
sin37
0
锛?/p>
0.6
锛?/p>
cos37
0
锛?/p>
0.8
銆?
绠卞瓙閲?/p>
G
锛?/p>
200N
锛岀瀛愪笌鍦伴潰鐨勫姩鎽╂摝鍥犳暟
渭
锛?/p>
0.30
銆傝鍖�閫熸媺鍔ㄧ瀛愶紝鎷夊姏
F
涓哄澶э紵
2
濡傚浘鎵�绀猴紝璐ㄩ噺涓?/p>
m
鐨勭墿浣撳湪鍊捐涓?/p>
胃
鐨勭矖绯欐枩闈笅鍖�閫熶笅
婊戯紝姹傜墿浣撲笌鏂滈潰闂寸殑婊戝姩鎽╂摝鍥犳暟銆?/p>
3
锛?/p>
锛?/p>
6
鍒嗭級
濡傚浘
10
鎵�绀猴紝
鍦ㄥ�捐涓?/p>
伪
=37
掳鐨勬枩闈笂鏈変竴鍧楃珫鐩存斁
缃殑妗ｆ澘锛屽湪妗ｆ澘鍜屾枩闈箣闂存斁涓�涓噸鍔?/p>
G=20N
鐨勫厜婊戠悆锛屾妸鐞?/p>
鐨勯噸鍔涙部鍨傜洿浜庢枩闈㈠拰鍨傜洿浜庢。鏉跨殑鏂瑰悜鍒嗚В涓哄姏
F
1
鍜?/p>
F
2
锛?/p>
姹傝繖
涓や釜鍒嗗姏
F
1
鍜?/p>
F
2
鐨勫ぇ灏忋�?/p>
4.
璐ㄩ噺涓?/p>
m
鐨勭墿浣撳湪鎭掑姏
F
浣滅敤涓嬶紝
F
涓庢按骞虫柟鍚戜箣闂寸殑澶硅涓?/p>
胃
,
娌垮ぉ鑺辨澘鍚戝彸鍋氬寑閫熻繍鍔紝鐗╀綋涓庨《鏉块棿鍔ㄦ懇鎿﹀洜鏁颁负
渭
锛屽垯鐗╀綋
鍙楁懇鎿﹀姏澶у皬涓哄灏戯紵
:
5
濡傚浘鎵�绀猴紝鐗╀綋鐨勮川閲?/p>
kg
m
4
.
4
飥?/p>
锛岀敤涓庣珫鐩存柟鍚戞垚
飩?/p>
飥?/p>
37
飦?/p>
鐨勬枩鍚戝彸涓婃柟鐨勬帹鍔?/p>
F
鎶婅鐗?/p>
浣撳帇鍦ㄧ珫鐩村澹佷笂锛屽苟浣垮畠娌垮澹佸湪绔栫洿鏂瑰悜涓婂仛鍖�閫熺洿绾胯繍鍔ㄣ�傜墿浣撲笌澧欏闂寸殑鍔ㄦ懇鎿﹀洜
鏁?/p>
5
.
0
飥?/p>
飦?/p>
锛屽彇閲嶅姏鍔犻�熷害
2
/
10
s
m
g
飥?/p>
锛屾眰鎺ㄥ姏
F
鐨勫ぇ灏忋�?/p>
锛?/p>
6
.
0
37
sin
飥?/p>
飩?/p>
锛?/p>
8
.
0
37
cos
飥?/p>
飩?/p>
锛?/p>
6
濡傚浘鎵�绀猴紝閲嶅姏涓?/p>
500N
鐨勪汉閫氳繃璺ㄨ繃瀹氭粦杞殑杞荤怀鐗靛紩閲?/p>
200N
鐨勭墿浣擄紝
褰撶怀涓庢按骞抽潰鎴?/p>
60
o
瑙掓椂锛岀墿浣撻潤姝紝涓嶈婊戣疆涓庣怀鐨勬懇鎿︼紝姹傚湴闈㈠浜虹殑鏀?/p>
鎸佸姏鍜屾懇鎿﹀姏銆?/p>
飦?
60