Fluid mechanics - pressure, area, force question

AI Thread Summary
The discussion centers on the effect of pressure applied to a curved surface of a piston in fluid mechanics. A question is raised about whether 25 PSI from a pump will exert a greater upward force against a downward force on the piston. It is clarified that the vertical force components can be integrated across the curved surface, resulting in an equivalent force to that on a flat surface. This highlights the importance of understanding pressure distribution in fluid systems. Overall, the mechanics of pressure and force interaction in pistons are emphasized.
italia458
Messages
6
Reaction score
0
I have a question based on this little diagram I whipped up!

http://i.imgur.com/2sLeQ.jpg

Will the 25 PSI (generated by a pump) applied to the curved surface on the bottom of the piston exert a higher force upwards to oppose the downward force on top of the piston?

A detailed explanation would be fantastic!

Thanks!
 
Physics news on Phys.org
You can integrate the vertical force components across the curved surface and find it equal to the flat one.
 
The rope is tied into the person (the load of 200 pounds) and the rope goes up from the person to a fixed pulley and back down to his hands. He hauls the rope to suspend himself in the air. What is the mechanical advantage of the system? The person will indeed only have to lift half of his body weight (roughly 100 pounds) because he now lessened the load by that same amount. This APPEARS to be a 2:1 because he can hold himself with half the force, but my question is: is that mechanical...
Hello everyone, Consider the problem in which a car is told to travel at 30 km/h for L kilometers and then at 60 km/h for another L kilometers. Next, you are asked to determine the average speed. My question is: although we know that the average speed in this case is the harmonic mean of the two speeds, is it also possible to state that the average speed over this 2L-kilometer stretch can be obtained as a weighted average of the two speeds? Best regards, DaTario
Some physics textbook writer told me that Newton's first law applies only on bodies that feel no interactions at all. He said that if a body is on rest or moves in constant velocity, there is no external force acting on it. But I have heard another form of the law that says the net force acting on a body must be zero. This means there is interactions involved after all. So which one is correct?
Back
Top