At this time, the volume of boiled water discharged by the object is V row = 35v = = 35v = 35× 0.0375m3 = 0.0225m3; ;
Buoyancy f = ρ gvrow =1000kg/m3×10n/kg× 0.0225m3 = 225n;
Answer: When the exposed liquid level of an object is two-fifths of the total volume, the buoyancy of the object is 225 N;
(2) The force of A is as shown in Figure A: the force of gravity GA and tension FA 1.
Buoyancy f floats 1 and is in equilibrium;
Then there are: FA 1=GA-F floating1= 750 n-225 n = 525 n; ?
When A is completely out of water, it is still in equilibrium under the action of gravity GA and tension FA2. Let the angle between the lever and the horizontal plane be ∠ b;
Yes: FA2=GAOB? COS∠BOC？ COS∠B = 750n×43 = 1000n；
The force on the moving pulley B is shown in Figure B, where FA 1 and FA 1' are equal (interaction force), and FA2 and FA2' are equal (interaction force);
Yes: when A is fully immersed, FC1= G+2FA1= G+1050N ① …
When A is semi-submersible, FC2=G +2FA2=G+2000n...②.
The stress of c is shown in figure c, where FC 1 equals fc 1' and FC2 equals FC2' (interaction force);
From the known conditions and formulas ① and ②, we can get:
FD 1 = 12(G+fc 1)= 12(2G+ 1050n)...③
FD2= 12 (g +FC2)= 12 (g+2000n) ...
The stress of the lever is shown in figure d,
According to the lever balance condition: FD? OD=F 1？ OE, FD 1 and FD 1' are equal (interaction force), and FD2 and FD2' are equal (interaction force). Substituting the known conditions and formulas ③ and ④, we can get:
F 1=ODOE？ FD 1 = 12fd 1 = 14(2g+ 1050n)...⑤
F2=ODOE？ FD2= 12FD2= 14(2G mobile+2000n) ...
Solution:: g dynamic = 100N
Answer: the gravity g on the moving pulley m is100n;
(3) The force analysis of human beings is shown in Figure E, and F 1 and f 1' are equal (interaction force):
P1= f1v =14 (2g dynamic+1050n) v.
P2=F2V= 14(2G mobile+2000n) v.
P 1P2=8 has been praised. What's your comment on this answer? Put away comments//high quality or satisfaction or special types or recommended answers dottimewindow.iperformance & window.iperformance.mark ('c _ best',+newdate); Lawyer recommendation service: If your problem is not solved, please describe your problem in detail and provide free professional consultation through Baidu Legal Pro. Other similar questions 2016-04-21(2011? Mentougou district model no.2) students of a school's science and technology team designed a model for salvaging objects from the water, as shown in the figure. Where d, e, g and h are all 22014-12-12. Students from a science and technology team in a school designed a model for salvaging objects from the water, as shown in the figure. Where D, E, G and H are all crown blocks, and M is a moving pulley. 1 Recommended for you: F.context('cmsRight', [{'URL':'/d065438f082025aaf51aa256e9edab. x-BCE-process = image % 2f resize % 2Cm _ lfit % 2Cw _ 450% 2Ch _ 600% 2c limit _ 1% 2f quality % 2Cq _ 85% 2f format % 2Cf _ auto '，' contractId':'A24KA00562 '，}，{ ' URL ':/s？ word = % E6 % AC % A7 % E6 % B4 % B2 % E6 % 9D % AF & sa = searchpromo _ ozb _ zhidao _ tuijian '，' src ':'/3 BF 33 a 87 e 950352 AAF 5 df 4954 143 fbf2b 2 1 18 b6b？ x-BCE-process = image % 2f resize % 2Cm _ lfit % 2Cw _ 450% 2Ch _ 600% 2c limit _ 1% 2f quality % 2Cq _ 85% 2f format % 2Cf _ auto '，' contractId ':' '，}])； The price of electric cars has dropped many times. Is the quality guaranteed? What impact will the "network toilet" have? Is Huaqiang North's second-hand mobile phone reliable? Why is the cost of cancer treatment getting higher and higher? I recommend f.context ('recbrand', [{"img": "\/86D6277F9E2F07083523F69DFB 24B 899A901F20d? x-BCE-process = image % 2f resize % 2Cm _ lfit % 2Cw _ 450% 2Ch _ 600% 2c limit _ 1% 2f quality % 2Cq _ 85% 2f format % 2Cf _ auto "，" url":"/hm.js？ 6859 ce 5a af 00 FB 00387 e 6434 E4 FCC 925 "； var s = document . getelementsbytagname(" script ")[0]； s.parentNode.insertBefore(hm，s)； })(); window . TT = 1720 109 152；