瀛︿範蹇呭
娆㈣繋涓嬭浇
鍒濅簩鐗╃悊鍘嬪己璁＄畻渚嬮
1
銆佸湪涓�涓噸
2 N
銆佸簳闈㈢Н涓?/p>
0.01 m
2
鐨勫鍣ㄩ噷瑁?/p>
8 N
鐨勬按锛屽鍣ㄤ腑姘寸殑娣卞害涓?/p>
0.05 m
锛屾妸瀹冩斁鍦ㄦ按
骞虫闈笂锛屽鍥?/p>
1
鎵�绀猴紟鍙?/p>
g
锛?/p>
10
N/kg
锛屾眰锛?/p>
(1)
姘村瀹瑰櫒搴曢儴鐨勫帇寮哄拰鍘嬪姏锛?/p>
(2)
瀹瑰櫒瀵规闈㈢殑鍘?/p>
鍔涘拰鍘嬪己锛?/p>
瑙ｏ細
(1)
姘村瀹瑰櫒搴曢儴鐨勫帇寮?/p>
p
1
锛?/p>
蟻gh
锛?/p>
1.0脳
10
3
kg/m
3
脳
10 N/kg脳
0.05 m
锛?/p>
500 Pa
姘村瀹瑰櫒搴曢儴鐨勫帇鍔?/p>
F
1
锛?/p>
p
1
S
锛?/p>
500 Pa脳
0.01 m
2
锛?/p>
5 N.
(2)
瀹瑰櫒瀵规闈㈢殑鍘嬪姏
F
2
锛?/p>
G
姘?/p>
锛?/p>
G
瀹?/p>
锛?/p>
8 N
锛?/p>
2 N
锛?/p>
10 N
瀹瑰櫒瀵规闈㈢殑鍘嬪己
p
2
锛?/p>
F
2
S
锛?/p>
10 N
0.01 m
2
锛?/p>
1000 Pa.
鍥?/p>
1
2
銆?/p>
鈥?/p>
椹笍椋炵嚂
鈥?/p>
鍙堢О涓?/p>
鈥?/p>
椹秴榫欓泙
鈥?/p>
锛屾槸鎴戝浗姹変唬鐨勮壓鏈澃浣滐紝鐜颁綔涓轰腑鍥芥梾娓镐笟鐨勫浘褰㈡爣蹇椼�傚鍥?/p>
鎵�绀烘槸涓�
鈥?/p>
椹笍椋炵嚂
鈥?/p>
鏃呮父宸ヨ壓鍝侊紝閲囩敤瀵嗗害涓?/p>
8.0脳
10
3
kg/m
3
鐨勫悎閲戞潗鏂欏埗閫狅紝鎬讳綋绉负
2脳
10
-3
m
3
锛?/p>
鈥?/p>
椹笍椋炵嚂
鈥?/p>
涓庢按骞冲簳搴х殑鎺ヨЕ闈㈢Н涓?/p>
4脳
10
-3
m
3
锛屾眰锛?/p>
锛?/p>
g
鍙?/p>
10N/kg
锛?/p>
锛?/p>
1
锛夎宸ヨ壓鍝佺殑璐ㄩ噺鏄灏戯紵
锛?/p>
2
锛夎宸ヨ壓鍝佸姘村钩搴曞骇鐨勫帇寮烘槸澶氬ぇ锛?/p>
瑙ｆ瀽锛?/p>
锛?/p>
1
锛夌煡閬撳伐鑹哄搧鐨勫瘑搴﹀拰浣撶Н锛屽彲鍒╃敤鍏紡
m=蟻V
璁＄畻璐ㄩ噺锛?/p>
锛?/p>
2
锛夊伐鑹哄搧瀵规按骞冲簳搴х殑鍘嬪姏灏辩瓑浜庡伐鑹哄搧鐨勯噸鍔涳紝鍙埄鐢ㄥ叕寮?/p>
G=mg
璁＄畻宸ヨ壓鍝佺殑閲嶅姏锛屽張鐭ラ亾宸ヨ壓鍝佷笌姘村钩搴曞骇鐨勬帴瑙﹂潰绉紝鍙埄鐢ㄥ叕寮?/p>
P=F/S
璁＄畻宸ヨ壓鍝佸姘村钩搴曞骇鐨勫帇寮猴紟
瑙ｏ細
锛?/p>
1
锛夆埖
V=2脳
10
-3
m3
锛?/p>
蟻=8.0脳10
3
kg/m
3
锛?/p>
鈭村伐鑹哄搧鐨勮川閲忎负锛?/p>
m=蟻V=8.0脳10
3
kg/m3脳
2脳
10
-3
m
3
=16kg
锛?/p>
锛?/p>
2
锛夆埖宸ヨ壓鍝佸姘村钩搴曞骇鐨勫帇鍔涘氨绛変簬宸ヨ壓鍝佺殑閲嶅姏锛?/p>
鈭?/p>
F=G=mg=16kg脳
10N/kg=160N
锛岃�?/p>
S=4脳
10
-3
m
3
锛?/p>
鈭村伐鑹哄搧瀵规按骞冲簳搴х殑鍘嬪己鏄細
P=F/S=160N/(4脳
10
-3
m
3
)4脳
104Pa
锛?/p>
3
銆佷竴鍧楀啓鏈夋牎璁殑鑺卞矖宀╃煶鏂欒川閲忎负
31.8t
銆佸瘑搴︿负
2.65脳
10
3
kg
锛?/p>
m
3
锛岀珛鍦ㄧ敤鐮栫爩鎴愮殑闀?/p>
4m
銆佸
2m
銆侀珮
0.5m
鐨勬按骞冲熀搴т笂
(
濡傚浘
鈥?/p>
鎵�绀?/p>
)
锛岀煶鏂欎笌鍩哄骇鐨勬帴瑙﹂潰绉负
2.12m
2
銆傚凡鐭ョ爾鐨勫瘑搴︿负
2.05脳
10
3
kg
锛?/p>
m
3
锛屽熀搴х爾缂濅腑姘存偿鐮傛祮鐨勫瘑搴︿笌鐮栫殑瀵嗗害鐩稿悓銆?/p>
(g
鍙?/p>
10N
锛?/p>
kg)
姹傦細
锛?/p>
1
锛夎姳宀楀博鐭虫枡鐨勪綋绉紱
锛?/p>
2
锛夌煶鏂欏鍩哄骇鐨勫帇寮猴紱
锛?/p>
3
锛夌煶鏂欏鍩哄骇涓庡熀搴у鍦伴潰鐨勫帇寮轰箣姣斻�?/p>
瑙ｏ細
锛?/p>
1
锛夎姳宀楀博鐭虫枡鐨勪綋绉細
V
鐭?/p>
=
m
鐭?/p>
/
飦?/p>
鐭?/p>
=31.8脳
10
3
kg/2.65脳
10
3
kg
锛?/p>
m
3
=12m
3
锛?/p>
2
锛夌敱浜庣煶鏂欐斁鍦ㄦ按骞冲熀搴т笂锛岀煶鏂欏鍩哄骇鐨勫帇鍔涘ぇ灏忕瓑浜庣煶鏂欏彈鍒扮殑閲嶅姏澶у皬锛?/p>
鍗筹細
F
鐭?/p>
=
G
鐭?/p>
=
m
鐭?/p>
g
=31.8脳
10
3
kg 脳
l0N
锛?/p>
kg=3.18脳
10
5
N
鍒欑煶鏂欏鍩哄骇鐨勫帇寮猴細
p
鐭?/p>
=
F
鐭?/p>
/
S
鐭?/p>
=3.18脳
10
5
N /2.12m
2
=1.5脳
10
5
Pa
锛?/p>
3
锛夊熀搴у彈鍒扮殑閲嶅姏澶у皬锛?/p>
G
鍩?/p>
=
m
鍩?/p>
g
=
飦?/p>
鍩?/p>
V
鍩?/p>
g
= 2.05脳
10
3
kg
锛?/p>
m
3
脳
锛?/p>
4m脳
2m脳
0.5m
锛?/p>
脳
10N
锛?/p>
kg= 8.2脳
10
4
N
鍩哄骇瀵瑰湴闈㈢殑鍘嬪己锛?/p>