9/3/2023 0 Comments E newton unitThe numerical value of the electric flux depends on the magnitudes of the electric field and the area, as well as the relative orientation of the area with respect to the direction of the electric field.Ī macroscopic analogy that might help you imagine this is to put a hula hoop in a flowing river. And this is a useful fact to remember.Īnyway, the final answer to our question is that the pascal is the correct unit for pressure.Figure 6.3 The flux of an electric field through the shaded area captures information about the “number” of electric field lines passing through the area. And the unit of pressure which we’ll say is one pascal is simply defined as one newton which is the force divided by one meter squared which is an area. Now just as a quick aside, remember that pressure which we’ll call □ is defined as the force per unit area. The correct unit of pressure is the pascal. What this means is that number five must be the right answer. So as swiftly as we moved onto number four, we can move away from it. Now, the joule is a unit of energy, not pressure. Moving swiftly onto number four then, we’ve got the joule. So number three is not our answer either. However, this also is not the same thing as a pressure. So what are the units of spring constant? Well, we’ve said earlier that force has a unit of newtons and extension will have a unit of meters. And we’re left with the force divided by the extension is equal to the spring constant. So if we rearrange the equation by dividing both sides by □, then the □s cancel on the right-hand side. Well, then, the force applied is equal to the spring constant multiplied by the extension of the spring which is □ - in other words, how much longer the spring is relative to its natural length. So let’s say the natural length of the spring is this distance here. Now, one example of a quantity which has the unit newtons per meter is the spring constant of a string because remember the force applied to a spring which we’ll call □ is equal to the spring constant of the spring □ multiplied by the extension of the spring. So number two is not the answer we’re looking for either. However, neither torque nor work down is the same as pressure. So as we said earlier, depending on the context, newton meters could be a unit of either torque or work done. And this torque would be □, the torque, is equal to the force multiplied by the perpendicular distance □ between the point at which the force is applied, which is here, and the point at which the plank rotates, which is here.Īnd once again, torque has a unit of newtons multiplied by meters. So newton meters could be a unit of work done or if we had a situation, where we had something that could rotate, let’s say a plank and we applied to force □ at distance □ away from the point at which this plank would rotate, then we would be applying a torque to this plank. And this work done will have units of newtons multiplied by meters because force has unit of newtons and distance has unit of meters. Depending on the context of the situation that quantities could either be, the work done on an object when we apply a force □ to the object and it moves a distance □, in which case, the work done □ is defined as the force applied multiplied by the distance moved. Now, the newton meter can be a unit for a couple of different kinds of quantities. And we can recall that meter is a unit of distance. Well, we’ve already said that newton is a unit of force from number one. Let’s look at number two then - newton meter. So number one is not the answer that we’re looking for. Well, the newton is a unit of force, not pressure. Let’s start with number one - the newton. So let’s go through them one by one and discuss what each of these units are for. Okay, so in this question, we’re trying to find the correct unit for pressure. Which of the following is the correct unit for pressure? 1) newton, 2) newton meter, 3) newtons per meter, 4) joule, 5) pascal.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |