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Select the pair whose dimensions are same:(a) Pressure and stress(b) Pressure and force(c) Stress and strain(d) Power and force...

Question

Select the pair whose dimensions are same:(a) Pressure and stress(b) Pressure and force(c) Stress and strain(d) Power and force

Select the pair whose dimensions are same: (a) Pressure and stress (b) Pressure and force (c) Stress and strain (d) Power and force



Answers

Select the pair whose dimensions are same: (a) Pressure and stress (b) Pressure and force (c) Stress and strain (d) Power and force

So the question here is what is the difference between force and pressure? So force pressure. So this is a vector quantity. It's a vector. So has a direction. This is a scaler quantity, which means which means that there is no specific direction and the definition of pressure or start a force is theme. The amount of push or pull and this pressure is stooge Is the forced divided by the area. So those were the several differences between forces in pressure and one more actually is this is measured in Newtons and this is measured in Pascal's in the SL. I saw you.

So in this case would given another trust. And we want to figure out what the forces are in this section, this section and this member. So we'll make a cut right through there. But first we need to just look at the overall system so you can figure out what these reaction forces are. And since the loading is not symmetric, they won't be the same. But we know there. Some has to be two F and F was given a 36 kips and then would take a moment about Point h took about here. And so we get we get f times 20 um F times 10 moment arm here. F time was 20 is a woman arm here and then this moment arm is minus r times total since it's 40 and so that equals zero and we get our one is 27 tips and are too. Is 45 chips again makes sense because there's more lowered towards the right and real action for us much. So now we cut this. We can just look at this half here or this section two left, and so in the X direction are in the Y direction. We have our one and then the y component of FCT, which is 7.5 over 12.5 just because right this triangle here aan den in the X direction we have the component of FCD, which is 10/12 again from this triangle here, and we have F C and F B that has some zero. And then I took moments about point, which is here. And so that means that you have negative moment from this reaction. And this moment arm is 20 20 feet, and then you have a moment from this guy and its moment is it's a positive moment, and this distance here was 7.5 feet. So now we have again three equations and Tony unknowns. We solve those get FCB is minus 45 tips. FB is minus 36 Skips and FC is 72 cubes, and that may begin make sense because we're pushing down on this. So we expected to bend like this should be stretching and should be compressing. And it's always hard to tell with these and the interior ones are doing. But it turns out that in this case, this one is actually in compression, which kind of makes sense. If you pushing down on it, it's probably trying to squeeze this one to a smaller area.

All right, we have these two boxes. One has a 20 by 2020 summer box, the other 20 by 20 by 40 centimeter box. And we wanna think about how does the pressure of air outside the two boxes compare? Now, this could be tricky to not overthink this question, because keep in mind that the pressure of air does not at all depend on the box. Um, you could have any size box, and the pressure of hair is still really gonna be the same cause air pressure, Uh, and for that reason for part A, we have just of same pressure for each one now leading into part B. And we think about forces. Yes. The pressure is going to be the same, however, and this pressure is gonna apply. Um ah. Force on each box based on the surface area of each box. Um, and we can see that pretty clearly through the equation, F is equal to p A. Uh, pH is Pierre. The pressure peer pressure. An area a is again serves over the box. Ah, and because box to will have a larger surface area again, this is just because it has a larger with for, you know, law, just a bigger box. It's area is gonna be bigger. So a two is gonna be greater than a one, and therefore F two is gonna agree that f one. Um but yes. So that I mean, that is the answer it thereafter to is gonna be good in F one because the area of box to with creator or the service area box years ago in the surface area box one and force based on pressure, is dependent on service area.

So in this case, we are going to classified them as contact force, Field force and not our force. Wait. He's due to gravitational field. Mass is not a force. In ASHA is a property which is not a force. Push off a hand is Ah contact Fools. Thrust is Ah contact force. The resistance is our contact force here. Resistance is are so contact force Acceleration is not a force on what day These the spinning force is a contact force.


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