Kinematics: Distance and Speed
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Questions and Answers

What is mechanics?

Mechanics is the study of motion and what produces and affects motion.

What is kinematics?

Kinematics is the description of motion.

What is distance?

Distance is the path length traveled from one location to another, depending on the path.

Distance is a scalar quantity.

<p>True (A)</p> Signup and view all the answers

Define average speed.

<p>Average speed is the distance travelled divided by time.</p> Signup and view all the answers

Average speed is a scalar quantity.

<p>True (A)</p> Signup and view all the answers

What is instantaneous speed?

<p>Instantaneous speed is the speed measured over a very short time span or the speed at a particular instant of time; it's what a speedometer reads.</p> Signup and view all the answers

A senior walks 0.3 km in 10 minutes. What is her average speed in meters per second?

<p>0.5 m/s</p> Signup and view all the answers

Flashcards

Mechanics

The study of motion and its causes.

Kinematics

Describes motion without considering its causes.

Dynamics

Analyzes the causes of motion, like forces.

Distance

The total length of the path traveled.

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Scalar Quantity

A quantity with only magnitude (size).

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Average Speed

Distance traveled divided by the time taken.

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Instantaneous Speed

Speed at a specific moment in time.

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Distance Value

Always a positive value representing length.

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Distance path

Distance is path dependent

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Scalar Speed

Scalar measurement of how fast an object is moving.

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Study Notes

  • Mechanics is the study of motion, what produces motion, and what affects motion.
  • Kinematics describes motion.
  • Dynamics analyzes the causes of motion.

Distance

  • Distance is the path length traveled from one location to another.
  • Distance depends on the path taken.
  • Distance is a scalar quantity with only magnitude or size.
  • Distance is always positive.

Average Speed

  • Average speed is the distance traveled divided by time.
  • Average speed is a scalar quantity.

Instantaneous Speed

  • Instantaneous speed is the speed measured over a very short time span.
  • It is the speed at a particular instant in time.
  • It is what a speedometer reads.

Example Problem

  • A senior walks 0.3 km in 10 minutes. Calculate her average speed in meters per second.
  • Average speed = Distance/Time = (0.3 * 10^3) / (10 * 60) = 0.5 m/s.

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Description

Learn about kinematics, which describes motion, and the concepts of distance, average speed, and instantaneous speed. Understand how to calculate average speed with an example problem. Distance is the path length traveled from one location to another.

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