Warning: foreach() argument must be of type array|object, bool given in /var/www/html/web/app/themes/studypress-core-theme/template-parts/header/mobile-offcanvas.php on line 20

Sketch the vector field \(\mathbf{F}=\langle x, y\rangle.\)

Short Answer

Expert verified
Based on the step-by-step solution above, describe how to sketch the vector field \(\mathbf{F}=\langle x, y\rangle\). To sketch the vector field \(\mathbf{F}=\langle x, y\rangle\), follow these steps: 1. Identify the vector field components: In this case, the x-component is \(x\) and the y-component is \(y\). 2. Choose points on the coordinate plane: Select several points like (-2,2), (-1,1), (0,0), (1,1), and (2,2) which have integer values that are easy to label. 3. Sketch vectors at chosen points: For each point (x, y), draw an arrow with length and direction determined by the x-component and y-component. For example, at the point (1, 1), the vector is \(\langle1, 1\rangle\), so draw an arrow pointing up and to the right. 4. Complete the vector field sketch: Continue choosing points and sketching vectors across the entire 2D plane, keeping in mind the symmetry of the vector field, to produce a clear visualization of the vector field \(\mathbf{F}=\langle x, y\rangle\).

Step by step solution

01

Identify the vector field components

The given vector field is \(\mathbf{F}=\langle x, y\rangle\). So, the x-component is simply \(x\) and the y-component is \(y\).
02

Choose points on the coordinate plane

Choose several points on the coordinate plane (preferably on a grid). You may want to choose points where the integer values of x and y are easy to label, such as near the center of the plane. For instance, you can choose the points (-2,2), (-1,1), (0,0), (1,1), and (2,2).
03

Sketch vectors at chosen points

For each point (x, y), draw an arrow starting at that point with a length and direction determined by the x-component and y-component of the vector field, which for this problem, are the same as the x and y coordinates themselves. 1. At the point (-2, 2), the vector is \(\langle-2, 2\rangle\). Draw an arrow pointing up and to the left. 2. At the point (-1, 1), the vector is \(\langle-1, 1\rangle\). Draw an arrow pointing up and to the left, but shorter than the first arrow. 3. At the point (0, 0), the vector is \(\langle0, 0\rangle\). This represents no movement or a zero vector, so there's no need to draw an arrow at this point. 4. At the point (1, 1), the vector is \(\langle1, 1\rangle\). Draw an arrow pointing up and to the right, the same length as the arrow at the point (-1, 1). 5. At the point (2, 2), the vector is \(\langle2, 2\rangle\). Draw an arrow pointing up and to the right, the same length as the arrow at the point (-2, 2).
04

Complete the vector field sketch

Continue the process of choosing points and sketching vectors for a more complete representation of the vector field. Keep in mind the symmetry of the vector field and try to cover the entire 2D plane to produce a clear visualization of the vector field \(\mathbf{F}=\langle x, y\rangle\).

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Over 30 million students worldwide already upgrade their learning with Vaia!

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

Consider the rotational velocity field \(\mathbf{v}=\mathbf{a} \times \mathbf{r},\) where \(\mathbf{a}\) is a nonzero constant vector and \(\mathbf{r}=\langle x, y, z\rangle .\) Use the fact that an object moving in a circular path of radius \(R\) with speed \(|\mathbf{v}|\) has an angular speed of \(\omega=|\mathbf{v}| / R\). a. Sketch a position vector a, which is the axis of rotation for the vector field, and a position vector \(\mathbf{r}\) of a point \(P\) in \(\mathbb{R}^{3}\). Let \(\theta\) be the angle between the two vectors. Show that the perpendicular distance from \(P\) to the axis of rotation is \(R=|\mathbf{r}| \sin \theta\). b. Show that the speed of a particle in the velocity field is \(|\mathbf{a} \times \mathbf{r}|\) and that the angular speed of the object is \(|\mathbf{a}|\). c. Conclude that \(\omega=\frac{1}{2}|\nabla \times \mathbf{v}|\).

For the following velocity fields, compute the curl, make a sketch of the curl, and interpret the curl. $$\mathbf{v}=\langle 0,-z, y\rangle$$

Use the procedure in Exercise 57 to construct potential functions for the following fields. $$\mathbf{F}=\langle-y,-x\rangle$$

Consider the potential function \(\varphi(x, y, z)=G(\rho),\) where \(G\) is any twice differentiable function and \(\rho=\sqrt{x^{2}+y^{2}+z^{2}} ;\) therefore, \(G\) depends only on the distance from the origin. a. Show that the gradient vector field associated with \(\varphi\) is \(\mathbf{F}=\nabla \varphi=G^{\prime}(\rho) \frac{\mathbf{r}}{\rho},\) where \(\mathbf{r}=\langle x, y, z\rangle\) and \(\rho=|\mathbf{r}|\) b. Let \(S\) be the sphere of radius \(a\) centered at the origin and let \(D\) be the region enclosed by \(S\). Show that the flux of \(\mathbf{F}\) across \(S\) is $$\iint_{S} \mathbf{F} \cdot \mathbf{n} d S=4 \pi a^{2} G^{\prime}(a) $$ c. Show that \(\nabla \cdot \mathbf{F}=\nabla \cdot \nabla \varphi=\frac{2 G^{\prime}(\rho)}{\rho}+G^{\prime \prime}(\rho)\) d. Use part (c) to show that the flux across \(S\) (as given in part (b)) is also obtained by the volume integral \(\iiint_{D} \nabla \cdot \mathbf{F} d V\). (Hint: use spherical coordinates and integrate by parts.)

Prove the following identities. Assume that \(\varphi\) is \(a\) differentiable scalar-valued function and \(\mathbf{F}\) and \(\mathbf{G}\) are differentiable vector fields, all defined on a region of \(\mathbb{R}^{3}\). $$\nabla \times(\mathbf{F} \times \mathbf{G})=(\mathbf{G} \cdot \nabla) \mathbf{F}-\mathbf{G}(\nabla \cdot \mathbf{F})-(\mathbf{F} \cdot \nabla) \mathbf{G}+\mathbf{F}(\nabla \cdot \mathbf{G})$$

See all solutions

Recommended explanations on Math Textbooks

View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.

Sign-up for free