绗?/p>
1
椤?/p>
鍏?/p>
7
椤?/p>
涓撻涓�路绗竴璁?/p>
鐗╀綋骞宠 涓庣洿绾胯繍鍔ㄢ�斺�旇鍓嶈嚜娴嬭瘖鏂嵎
鑰冪偣涓�
闈欐�佸钩琛￠棶棰?/p>
1.
[
鑰冩煡鍗曚釜鐗╀綋鐨勫钩琛￠棶棰?/p>
]
寮犻箯鍚屽鍦ㄥ甯濡堟礂瀹岃。鏈嶅悗
,
鎸傚湪濡傚浘鎵�绀虹殑鏅捐。鏋朵笂鏅炬檼
,
A
銆?/p>
B
涓虹珫
鐩村澹佷笂绛夐珮鐨勪袱鐐?/p>
,
AO
銆?/p>
BO
涓洪暱搴︾浉绛夌殑涓ゆ牴杞荤怀
,
CO
涓轰竴鏍硅交鏉嗐�傝浆杞?/p>
C
鍦?/p>
AB
涓偣
D
鐨勬涓嬫柟
,
AOB
鍦ㄥ悓涓�姘村钩闈笂銆傗垹
AOB
锛?/p>
60
掳
,
鈭?/p>
DOC
锛?/p>
30
掳
,
琛ｆ湇
璐ㄩ噺涓?/p>
m
銆備笅鍒楄娉曟纭殑鏄?/p>
(
)
A
锛?/p>
CO
鏉嗘墍鍙楃殑鍘嬪姏澶у皬涓?
2
3
3
mg
B
锛?/p>
CO
鏉嗘墍鍙楃殑鍘嬪姏澶у皬涓?/p>
mg
C
锛?/p>
AO
缁虫墍鍙楃殑鎷夊姏澶у皬涓?/p>
3
mg
D
锛?/p>
BO
缁虫墍鍙楃殑鎷夊姏澶у皬涓?/p>
mg
瑙ｆ瀽锛?/p>
閫?/p>
D
璁剧怀
AO
鍜岀怀
BO
鎷夊姏鐨勫悎鍔涗负
F
,
浠?/p>
O
鐐逛负鐮旂┒瀵硅薄
,
O
鐐瑰彈鍒板悜涓嬬殑鎷?/p>
鍔?/p>
mg
銆佹潌鐨勬敮鎸佸姏
F
2
鍜岀怀
AO
涓庣怀
BO
鎷夊姏鐨勫悎鍔?/p>
F
,
浣滃嚭鍔涚殑绀烘剰鍥?/p>
,
濡傚浘鐢叉墍绀?/p>
,
鏍规嵁骞宠 鏉′欢寰楋細
F
锛?/p>
mg
tan
60
掳
锛?/p>
3
mg
;
F
2
锛?
mg
sin 30
掳
锛?/p>
2
mg
銆傚皢
F
鍒嗚В
,
濡傚浘涔欐墍绀?/p>
,
璁?/p>
AO
鎵�鍙楁媺鍔涚殑澶у皬涓?/p>
F
1
,
鍥犱负鈭?/p>
AOB
锛?/p>
60
掳
,
鏍规嵁鍑犱綍鐭ヨ瘑寰楋細
F
1
锛?
3
3
F
锛?/p>
mg
,
鎵�浠ョ怀
AO
鍜?/p>
BO
鎵�鍙楀埌鐨勬媺鍔涘ぇ灏忎负
mg
,
鑰屾潌
OC
鎵�鍙楀埌鐨勫帇鍔涘ぇ灏忕瓑浜?/p>
2
mg
;
鏁?/p>
D
姝ｇ‘銆?/p>
2
锛?/p>
[
鑰冩煡澶氫釜鐗╀綋鐨勫钩琛￠棶棰?/p>
]
[
澶氶�?/p>
]
濡傚浘鎵�绀?/p>
,
姘村钩妗岄潰涓婃湁涓変釜鐩稿悓鐨勭墿浣?/p>
a
銆?/p>
b
銆?/p>
c
鍙犳斁鍦ㄤ竴璧?/p>
,
a
鐨勫乏绔�氳繃涓�鏍?/p>
杞荤怀涓庤川閲忎负
m
锛?/p>
3
kg
鐨勫皬鐞冪浉杩?/p>
,
鍗婄悆褰㈠櫒鐨夸腑鐨勮交缁充笌姘村钩鏂瑰悜鐨勫す瑙掍负
60
掳
,
灏忕悆闈欐
鍦ㄥ厜婊戠殑鍗婄悆褰㈠櫒鐨夸腑
,
姘村钩鍚戝彸鐨勬媺鍔?/p>
F
锛?/p>
10 N
浣滅敤鍦?/p>
b
涓?/p>
,
涓変釜鐗╀綋淇濇寔闈欐鐘舵�併�?/p>
g
鍙?/p>
10 m/s
2
,
涓嬪垪璇存硶姝ｇ‘鐨勬槸
(
)
A
锛庤交缁冲鐗╀綋
a
鐨勬媺鍔涘ぇ灏忎负
10
3
N