Vectors and Scalars (Leaving Cert Physics): Quizzes

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Physical Quantities
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What is a physical quantity?

A property measured with number & unit

What two components are essential for any measurement in physics?

Numerical value & unit

What defines a scalar quantity?

Has magnitude only

Which of these is a scalar quantity?

Temperature

Which of these is a vector quantity?

Acceleration

What defines a vector quantity?

Has magnitude & direction

How do scalar quantities combine?

Using ordinary arithmetic rules

Two vectors with same magnitude but different directions are:

Completely different vectors

In a vector arrow diagram, what does the length of the arrow represent?

Magnitude of the vector

What is a resultant vector?

Single vector with same overall effect

Two forces of 55 N east and 33 N east act on an object. What is the resultant?

88 N east

A 1010 N force acts east and a 66 N force acts west. What is the resultant?

44 N east

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