Scalar and Vector Quantities Flashcards

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Questions and Answers

What is scalar quantity?

A quantity that has magnitude but no particular direction.

What is vector quantity?

A quantity that has magnitude and acts in a particular direction.

Scalar quantities include:

  • Displacement
  • Velocity
  • Distance (correct)
  • Acceleration

Scalar quantities change when?

<p>When their magnitude changes.</p> Signup and view all the answers

Vector qualities include:

<p>Weight (B)</p> Signup and view all the answers

Vector quantities change when?

<p>When their magnitude changes, direction changes, or both change.</p> Signup and view all the answers

What quantity is speed?

<p>Scalar</p> Signup and view all the answers

Why is speed a scalar quantity?

<p>It is the rate of change in the distance travelled by an object.</p> Signup and view all the answers

The difference in two vector quantities is?

<p>Final vector - initial vector.</p> Signup and view all the answers

The difference in two scalar quantities is?

<p>Large value - small value.</p> Signup and view all the answers

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Study Notes

Scalar and Vector Quantities

  • Scalar quantity has magnitude only, with no specific direction.
  • Vector quantity possesses both magnitude and direction.

Examples of Scalar Quantities

  • Distance: Measurement of space between two points.
  • Speed: Rate of change of distance without regard to direction.
  • Time: Measured duration of events.
  • Power: Rate of doing work or energy transfer.
  • Energy: Capacity to do work.

Characteristics of Scalar Quantities

  • Change occurs only when the magnitude changes.

Examples of Vector Quantities

  • Displacement: Change in position in a specific direction.
  • Velocity: Speed in a given direction.
  • Acceleration: Rate of change of velocity.
  • Force: Interaction that causes an object to change motion.
  • Weight: Gravitational force acting on an object, dependent on mass and gravity.
  • Momentum: Product of an object’s mass and its velocity.

Characteristics of Vector Quantities

  • Change occurs if magnitude changes, direction changes, or both change.

Key Definitions

  • Speed is classified as a scalar quantity due to its lack of directional component.
  • Velocity is a vector quantity because it includes both speed and direction.

Vector Difference Calculation

  • The difference between two vector quantities is calculated as final vector minus initial vector.

Scalar Difference Calculation

  • The difference between two scalar quantities is calculated as large value minus small value.

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