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You CAN Ace Calculus

Topics You Need To Understand For This Page

Related Topics and Links

17Calculus Subjects Listed Alphabetically

Single Variable Calculus

Multi-Variable Calculus

Differential Equations

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Do you have a practice problem number but do not know on which page it is found? If so, enter the number below and click 'page' to go to the page on which it is found or click 'practice' to be taken to the practice problem.

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On this page we will give you an introduction to vector fields and how to draw them. We also have a few practice problems. Two main ways to work with vector fields involve the divergence and the curl.

Difference Between Vector Functions, Vector-Valued Functions and Vector Fields

These three terms are easily confused and some books and instructors interchange them. In general, vector functions are parametric equations described as vectors. Vector fields usually define a vector to each point in the plane or in space to describe something like fluid flow, air flow and similar phenomenon. Vector-valued functions may refer to either vector functions or vector fields. Look carefully at the context and check with your instructor to make sure you understand what they are talking about.

In all three cases, you need to look at the context to see what is being discussed. To avoid confusion, we do not use the term vector-valued function on this site but some of the instructors in the videos we use refer to vector-valued functions.

This first video explains vector fields in detail, with lots of examples and graphs.

Dr Chris Tisdell - Intro to vector fields [20mins-6secs]

video by Dr Chris Tisdell

As explained in the last video, you have already seen vector fields if you have learned how to calculate gradients since the gradient assigns a vector to each point in space.

Here is a second video explaining vector fields. He goes into more detail about applications and why it is important to have a correct understanding of them. There is some repetition but it is important to think about this from different angles to get a good perspective.

Dr Chris Tisdell - What is a vector field? [42mins-46secs]

video by Dr Chris Tisdell

The videos above should be enough to explain the basics of vector fields. If you would like a couple of other perspectives, here are two more video clips explaining the same concepts.

PatrickJMT - Vector Fields [1min]

video by PatrickJMT

MIP4U - Vector Fields [4mins-16secs]

video by MIP4U

Okay, so that should be enough explanation to get you started on vector fields. You can find a few practice problems below. After that, the next topic discusses one way to manipulate vector fields, the curl.

Practice

Conversion Between A-B-C Level (or 1-2-3) and New Numbered Practice Problems

Please note that with this new version of 17calculus, the practice problems have been relabeled but they are MOSTLY in the same order. So, Practice A01 (1) is probably the first basic practice problem, A02 (2) is probably the second basic practice problem, etc. Practice B01 is probably the first intermediate practice problem and so on.

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Instructions - - Unless otherwise instructed, plot these vector fields.

\( \vec{F} = 2\hat{i} + 2\hat{j} \)

Problem Statement

Plot the vector field \( \vec{F} = 2\hat{i} + 2\hat{j} \)

Solution

827 solution video

video by Dr Chris Tisdell

close solution

\( \vec{F}(x,y) = -y\hat{i} + x\hat{j} \)

Problem Statement

Plot the vector field \( \vec{F}(x,y) = -y\hat{i} + x\hat{j} \)

Solution

828 solution video

video by PatrickJMT

close solution

\( \vec{F}(x,y) = -\hat{i} + \hat{j} \)

Problem Statement

Plot the vector field \( \vec{F}(x,y) = -\hat{i} + \hat{j} \)

Solution

829 solution video

video by MIP4U

close solution

\( \vec{F}(x,y) = -x \hat{j} \)

Problem Statement

Plot the vector field \( \vec{F}(x,y) = -x \hat{j} \)

Solution

830 solution video

video by MIP4U

close solution

\( \vec{F}(x,y) = x\hat{i} + y\hat{j} \)

Problem Statement

Plot the vector field \( \vec{F}(x,y) = x\hat{i} + y\hat{j} \)

Solution

831 solution video

video by MIP4U

close solution
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