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Physical Quantities: Scalars and Vectors

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Physical Quantities: Scalars and Vectors

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Questions and Answers

Which of the following physical quantities is best represented by a scalar?

Force

Mass (correct)

Velocity

Displacement

A vector is operationally defined as:

An arrow oriented in space, with length representing magnitude and orientation representing direction. (correct)

A numerical value representing the magnitude of a physical quantity.

The rate of change of a physical quantity over time.

The total distance traveled by an object.

If a vector is moved around on a coordinate system, which property must remain unchanged?

Its ending position.

Its length and orientation. (correct)

Its starting position.

The coordinate points it crosses through.

Which of the following is a vector quantity?

<p>Force (D)</p> Signup and view all the answers

What distinguishes a vector from a scalar?

<p>A vector has both a magnitude and a direction, whereas a scalar has only a magnitude. (A)</p> Signup and view all the answers

Study Notes

Physical Quantities

Some physical quantities, like mass and temperature, are scalars, described by a single number.
Other quantities, like displacement, velocity, and force, are vectors. They have both a magnitude (number) and a direction.
Vectors are represented as arrows. The arrow's length signifies the quantity's magnitude, and its direction indicates the vector's orientation.
Vectors can be moved anywhere on a coordinate system, keeping their length and direction the same.

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Description

This quiz explores the distinction between scalar and vector physical quantities. It covers their definitions, representations, and key characteristics. Understand how magnitude and direction play a vital role in the analysis of these quantities.