Vectors & Scalars (Leaving Cert Applied Maths): Flashcards

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Vectors & Scalars
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Scalar quantity

Measurement with magnitude (size) only

Vector quantity

Measurement with magnitude and direction

Speed

Distance travelled per unit time

Velocity

Distance per unit time AND direction of travel

3 scalar quantity examples

Speed, mass, temperature

3 vector quantity examples

Velocity, acceleration, force

Visual representation of vectors

Arrows: length shows magnitude, arrow shows direction

Vector arrow length shows

Magnitude or strength of vector

Method to add vectors

Parallelogram method

Scalar × vector effect

Changes magnitude, keeps direction same

Condition for equal vectors

Same magnitude AND same direction

Resultant vector

Combined effect of vectors acting together

What is −v⃗-\vec{v}?

Vector with same magnitude, opposite direction to v⃗\vec{v}

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