Topic 3 - Scalars vs. Vectors

Question 1

Magnitude

Answer 1

The numerical value of a dimension

We call quantities with just a magnitude a “scalar”

Question 2

Direction

Answer 2

Can be along a straight line (like an axes) or in angles

We call quantities with a magnitude and a direction a “vector”

Question 3

Scalar

Answer 3

Only have magnitude

Examples: mass, time, distance, speed

Question 4

Vector

Answer 4

Have both magnitude and direction

Examples: velocity, acceleration, force, displacement

Question 5

How to work with Vectors: Part 1

Answer 5

1. Read the question and draw out the vectors —> highlight the resultant vector
2. Decompose all vectors into x- and y-components
3. Add up all the x- and y-components separately
   -The total x-component 𝑅𝑥 will give you the x-component of the resultant
   -The total y-component 𝑅𝑦 will give you the y-component of the resultant
4. Draw another vector with just the resultant and find two values:

Question 6

How to work with Vectors: Part 2

Answer 6