Practice Vector Intuition in Math

Use these practice problems to test your method after reviewing the concept explanation and worked examples.

Quick Recap

A mathematical object with both a magnitude (size) and a direction, often drawn as an arrow.

An arrow: how long it is (magnitude) and which way it points (direction).

Showing a random 20 of 50 problems.

Example 1

easy
Which is a vector: '5 km' or '5 km north'?

Example 2

easy
What is the difference between a vector and a scalar? Give one example of each.

Example 3

easy
Scale the vector ⟨1,−2⟩ by the scalar −3.

Example 4

medium
Find the magnitude of ⟨1,2,2⟩.

Example 5

easy
Find the magnitude of v⃗=⟨5,12⟩.

Example 6

easy
A displacement vector points 3 units east and 4 units north. What is the magnitude of this vector?

Example 7

hard
Find the unit vector in the direction of w⃗=(3,−4).

Example 8

challenge
A person walks ⟨3,4⟩ then ⟨−3,−4⟩. Compare the total distance walked with the magnitude of total displacement, and explain the difference.

Example 9

easy
Classify as vector or scalar: '60 mph east'.

Example 10

medium
Two vectors have the same direction but different magnitudes. Are they equal?

Example 11

medium
A car drives ⟨30,40⟩ km. What is the straight-line distance traveled?

Example 12

easy
What is the magnitude of the zero vector 0⃗?

Example 13

medium
A vector goes from point A(1,2) to point B(4,6). Write it in component form.

Example 14

medium
Find the magnitude of the 3D vector ⟨2,3,6⟩.

Example 15

hard
If ∣a⃗∣=7, ∣b⃗∣=24, and ∣a⃗+b⃗∣=25, what is the angle between a⃗ and b⃗?

Example 16

hard
Find a unit vector perpendicular to ⟨3,4⟩ in the plane.

Example 17

medium
Subtract: ⟨9,−2⟩−⟨4,3⟩.

Example 18

easy
A vector has two key properties. Name them.

Example 19

medium
Why must displacement be a vector but distance only a scalar?

Example 20

hard
Two vectors of magnitude 4 each make a 60° angle. Find the magnitude of their sum using the law of cosines.