Forces in a Line: Examining the Relationship Between Mass and Force

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The discussion revolves around the relationship between mass and force, specifically questioning whether S1 equals mg/2 in a given scenario. Participants analyze the forces acting on the system, focusing on the implications of mass distribution and gravitational force. The reasoning includes examining the equilibrium of forces and the application of Newton's laws. Clarifications on the correct interpretation of the forces involved are provided to support the argument. The conversation emphasizes the importance of understanding fundamental physics principles to solve such problems accurately.
Heexit
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Hello!
1679570465759.png

In the following image, is it true that S1 = mg/2.
Thanks for answears!
 
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If have close pipe system with water inside pressurized at P1= 200 000Pa absolute, density 1000kg/m3, wider pipe diameter=2cm, contraction pipe diameter=1.49cm, that is contraction area ratio A1/A2=1.8 a) If water is stationary(pump OFF) and if I drill a hole anywhere at pipe, water will leak out, because pressure(200kPa) inside is higher than atmospheric pressure (101 325Pa). b)If I turn on pump and water start flowing with with v1=10m/s in A1 wider section, from Bernoulli equation I...

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