# Scalars and vectors

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What two categories can quantities be divided into?
Scalars and vectors.
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What are scalars?
Scalars are quantities with no direction and only magnitude.
E.g. speed, mass, distance.
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What are vectors?
Vectors are quantities that have both magnitude and direction.
E.g. displacement, velocity, weight.
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How are vectors represented?
By arrows.
The direction of the arrowhead indicates the direction of the vector.
The length of the arrow indicates the magnitude of the vector.
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What is the resultant vector?
The resultant vector is the combination of vectors at right angles to one another.
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How do you calculate the vector?
With a graph or with Pythagoras's theorem.
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How do you calculate the resultant force?
Resultant force (FR)= Effect of force 1 (F1) + effect of force (F2).
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What is the Pythagoras theorem equation?
c2= a2+b2
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What is the mnemonic of Pythagoras theorem?
SOH-CAH-TOH
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## Other cards in this set

### Card 2

#### Front

What are scalars?

#### Back

Scalars are quantities with no direction and only magnitude.
E.g. speed, mass, distance.

### Card 3

#### Front

What are vectors?

### Card 4

#### Front

How are vectors represented?

### Card 5

#### Front

What is the resultant vector?