Motion

Front

Motion Noun

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[mo-shun]

Back

Motion

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The change of an object's position over a period of time with respect to a reference point.

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Example: This diagram shows motion as a car changing its position along a path, representing distance. The arrow indicates the direction of movement.

Front

Position Noun

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[puh-zish-un]

Back

Position

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An object's specific location, described by its distance and direction from a reference point.

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Example: This number line shows a reference system. An object's position is its specific location on the line, like '7', relative to the starting point '0'.

Front

Frame of Reference Noun

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[freym uv ref-er-uhns]

Back

Frame of Reference

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A set of coordinates or a non-moving object used to detect or measure motion.

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Example: This image shows that motion is relative. To the girl on the ground, the girl in the truck is moving, but from her own frame of reference, the girl in the truck is still.

Front

Reference Point Noun

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[ref-er-uhns poynt]

Back

Reference Point

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A stationary place or object used for comparison to determine if an object is in motion.

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Example: To see if the car is moving, you can use a stationary object like the 'Home' or 'Friend's house' as a reference point.

Front

Distance Noun

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[dis-tuhns]

Back

Distance

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A scalar quantity representing the total length of the path traveled by an object, regardless of direction.

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Example: This diagram shows that distance is the total length of the path an object travels (the 8 Km winding road), not the straight-line path.

Front

Displacement Noun

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[dis-pleys-muhnt]

Back

Displacement

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A vector quantity representing the change in an object's position from its starting point to its final point.

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Example: This diagram shows that displacement is the straight-line path and direction from a start point to an end point, unlike distance, which is the total length traveled.

Front

Scalar Noun

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[skey-ler]

Back

Scalar

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A physical quantity that is fully described by its magnitude, which is its size or amount, only.

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Example: A speedometer shows speed, a scalar quantity. It tells you how fast you are going (magnitude) but not the direction you are traveling in.

Front

Vector Noun

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[vek-ter]

Back

Vector

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A physical quantity that is described by both its magnitude and its specific direction.

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Example: This image shows a push, which is a type of force. The arrow represents the vector, indicating both the direction and the applied force (magnitude).

Front

Speed Noun

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[speed]

Back

Speed

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A scalar quantity that measures the rate at which an object covers distance over a period of time.

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Example: This image shows that speed is calculated by dividing the distance an object travels (in meters) by the time it takes (in seconds).

Front

Average Speed Noun

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[av-er-ij speed]

Back

Average Speed

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The total distance traveled by an object divided by the total time taken to travel that distance.

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Example: This diagram shows a car's position at different moments in time (T0, T1, T2, T3), illustrating the distance traveled over a time period.