Quantities, Units & Modelling (Edexcel A-Level Mathematics): Quizzes

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Scalars & Vectors
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What is a scalar quantity?

A quantity with magnitude only

Which of the following is a scalar quantity?

Mass

What is a vector quantity?

A quantity with magnitude & direction

Which of the following is a vector quantity?

Acceleration

In a vector arrow, what does the length represent?

The magnitude

In a vector arrow, what does the arrow's direction represent?

The direction of the vector

How do you add vectors graphically?

Place them head-to-tail

How are vectors added mathematically?

Break into components & add them

What is a resultant vector?

The combined effect of 2+ vectors

Forces of 1010 N east & 1010 N north give what resultant magnitude?

14.114.1 N

What does scalar multiplication do to a vector?

Changes magnitude, not direction

A hiker walks 44 km north then 33 km east. What is the resultant displacement?

55 km

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