In the former part, a space curve, the parameters defining the curve According to t, the solution that we have achieved curvature twisting, finding a unit vector We learned. Now this is what we have learned to consolidate as well as To view an interesting problem, Let practices. Proceeding to the application, our formula Let's get together. Such expressions of b t n, Expression of the expression of curvature and torsion like this. As provided herein, now calculation method goes like this. The first step, because the curve of x x We define with. We need to calculate the first three derivatives. point x x2 x3 point point because, at t x point b There are points x2, x2 points off there and in to, there x3 point. Then, after the calculation of their these multiplications 2s 3-multiplying and multiplying these lengths account We have to this because they formula is set in the third step in -putting them. Now that's a spiral helix Let's examination, ie before the construction of a helical Let parametric equations. Maybe some of you have done, yapmadınızsa can be done easily. As on a page, draw a line of a circular shape that I Bükel on a circle that is, a on a circular cylinder. , On which the straight line drawn, us will give a helical spiral. If we look a bit more digital, horizontal 2 pi times a, b vertical length of 2 times pi If we choose, horizontal we translate this into a circle is the radius of a circle wall. This slope also seems to be a divided by b. With these thoughts helix equation, x A times the cosine t happen, as it on which we The projection of this point moves falls on this circle. On this circle is equal to theta If we think we're starting from scratch, It is a times cosine theta x, y at a time is sine theta. Parametric equation of a circle, but The difference between the circle, the circle always in the plane Standing here on the way back in, b in line with the rise of this the helix formed this happens. Thus defining the helical vector here Or seen as a cosine of theta t, We chose here as a parameter. be a sine t and b t. As we define the spiral Let's just its derivatives. immediately by the point x such that x from derivatives t minus sine and cosine t come b. When we take the second derivative of x points We take one more derivative. I also point x3, x2 point again We know that with derivatives. Now, in this formula, we point x and x2 noktanınvekt needed to multiplication. The length of point x, the point x of the point x2 multiplying the length of a 3-in. Now if we make them, with point x vector product of the point x2 work determinants comes from. i j k are writing. Used as the first vector point x we put on line. x2 point we put in the last row and We are opening. I components of the first row and column tumbling these zero, but the pros will become negative, the second diagonal change of sign changes Due to changes in the EU once the sine t. .mu.l we're looking at, minus the EU in a similar manner times the cosine cosine t involved. K, .delta we're looking at here is an interesting There formation. See a squared sine-squared t, where a square For frame t is the cosine, staying here is just a square, so this expressed very simply appeared. If we multiply this by taking away the point x3 See here x3 point We found point x x2 point. It is also very interesting from the inner product simplification going on, see EU sine-squared t, b times a here, cosine squared t, then the two combination b involved because a square sine-squared t is 1 to t plus cosine square, a is multiplied by the square zero For one thing does not come from there, see How easy was this triple product. When we look at the length of point x, x point was here, see the first one here frame, plus second squared, sine-squared t plus for giving a squared cosine squared t 1, third-squared plus b squared here, plus b squared is coming from Accra to say that, If we define it as the definition of c frame, x is a fixed point of the square. Gene vectors with point x x2 point Taking the length of the product, see here again, sine-squared t, kosinüzs frame t is happening here, ab, a square b squared is coming. Here comes again than a square, the accounts here You can easily see, the AC turns out, this Coming up with a simple structure. When we put them to behold If we rewrite this We found the size, t, by definition, or the formula x at point x on the length of the point It was part of the x point We found that a certain length c, divided by the it turns out. because we need to point t n, t point t point longitudinal division, t, t certain point now easier to find, Sinisa will be cosine, will be minus two is sine cosine out to be negative for the negative turns out to be constant b is divided by c to b its derivative zero. So we did not find t point point their divide here by dividing the length of the c going. Already it is one of the neck easily see, cosine squared plus sinus square point x and x2 port vector b multiplication, we know that in line, the unit vector divided by its length This work will be of this size here We take the size of its longitudinal split time As you can see a time it turns out to b. Now here are a variety of delivery possible. The inner product and the inner product of t is zero because it is orthogonal need. See here sine cosine t t here t sine cosine t, different signs At the same coefficients, where the reset This is because the product is zero. Again let's look at the product of n and b. Sine cosine, sine and cosine again different sign, and the third is zero, again output from the zero. If you hit it in a similar way to zero in We see that go. There were as curvature and torsion, point x of the point multiplied by x2 length, it We have calculated the point where AC x c divided by the cube of the length of the point x respectively. You can see from the division of c cubes As we come to this conclusion. And finally iii of this triple product of these two product longitudinal are divided here b divided by c square is çıky. Helical structure to emphasize the privileged because I got output constant curvature, torsion also constant output, How the curvature at each point on the circle If that is going hard at it on the helix on spiral at every point of the curvature and torsion constant involved. that does not change from point to point. If we reverse the problem, curvature and found torsion is constant curve one has to say a huge curve in the universe, both curvature and torsion is constant. Now comes to mind right now, this spiral, 've read the double helix Perhaps you've heard at least, consists of a helix structure of the DNA I wonder where I wonder if there is a relationship molecules that together form Seems curvature and torsion A constant travels around the subject our work Or something out of nothing in excess, but The interesting thing is certain. Now I want to make a second example. Route and leave it a little. It's called double parabola, because at that If you look at the third size is not taken instead of t x, y de 1 divided by 2 x squared Or y not be here again t is difficult to say at x x cube would be divided by 3. So you have a parabola in two directions. Someone one second-degree parabola tertiary double parabola parabola it from that angle curve is called. T on the curve equals 1, and in general, for t curvature and torsion unit vectors Please account. As the values t is 1, it I want to give the solution immediately. So I do not want to give the interim, the same as in the previous problems. We will take the derivative of x, the second derivative We will take, we'll take the third derivative, we see their point x of the point x2 vector multiplication, will account for the triple product and t is equal to 1 will receive the value. We make them the following conclusions emerge. Search for you to do it accounts I'm waiting, I'm giving it as homework. As in the general account; all of a sudden t equals Let's not one, that's still several variants take them When we put this t function as we find them. Issues to be considered here, Unlike spiral at any point, both torsion and curvature of the tangent, We see that changed. Where t is equal to 1 if we put this generally results from a previous custom We're reaching consequences. Now here are a few more papers. This drop can say spiral, a In succeeding helix D. The difference between succeeding helix D. radius was fixed. If you look here, along with t radius There are an increasing spiral here, drop it It's called spiral because it does not remain constant radius, opening going, but also the z direction is rising, it is equal to t zero and a is 1 and b is equal to If you find one that's close to the corresponding values so it turns out, is going to like, vectors that turns out. The same way as before, where A second thing is that, again, this time a but this is on a spiral circle spiral See the falling squares of x and y when you get step onto the cylinder but a means This time linear , not as second-degree rise. So increasingly growing step. You have arrived at once if you return in succeeding helix D. height there were 2 p, twice in the neck if you return the same height I was going repeated. Up and down the stairs of a minaret Taking your promotion always at the same height as the stairs formed, If this step is going to rise here, is going to increase, gene wherein the accounts of the previous Follow your Google account. There is a duty on the last one. We know that the position x, t is the time The first derivative of the velocity data, the second derivative The acceleration data. Now i j k components that account we can As the calculations in terms n and t We can. Where v x is the definition of the derivative with respect to t In and the length of the vector v, the numeric as we show. This numerical velocity vector, which is the number if you have speed We also quickly realized the velocity, speed The magnitude of speed. This identity to find these results I'm waiting. the acceleration speed derivative with respect to time, wherein a t There are so tangential direction acceleration. And also the perpendicular direction There are tangential acceleration in the direction perpendicular to that in this We call centrifugal acceleration, it already in many physics courses The result is shown. Ever with derivatives of vectors We care. Dealing now with the integral of the vector we want. So far relates to derivatives Examples of what you see and To late now subject here We stop. In the next session of the integral of a vector will deal with.
