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Explain the meaning of position, displacement, and distance traveled as they apply to an object moving along a line.

Short Answer

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Question: Explain the differences between position, displacement, and distance traveled for an object moving along a straight line and provide examples to illustrate each concept. Answer: Position refers to the location of an object along a defined path, usually represented by a coordinate on a number line. Displacement is the change in position between two points in time, considering both magnitude and direction. Distance traveled is the total length of the path an object takes, regardless of direction. For example, if an object moves from x=0 meters to x=10 meters, its position is 10 meters, displacement is 10 meters in the positive direction, and distance traveled is 10 meters. In another example, if the object moves 5 meters right and 3 meters left, its final position is x=2 meters, its displacement is 2 meters in the positive direction, and the distance traveled is 8 meters.

Step by step solution

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1. Understand Position

Position refers to the location of an object at a particular point in time along a defined path or reference. In physics, this is often represented by a coordinate (usually 'x') on a number line or Cartesian coordinate system. For instance, imagine an object placed on a straight path. The point where the object is currently located is its position. This value is drawn from a reference point (usually the origin) on the line.
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2. Understand Displacement

Displacement is the change in position of an object between two points in time. It is a vector quantity, meaning it has both magnitude and direction. To calculate the displacement (delta x) of an object, subtract its initial position (x_initial) from its final position (x_final): delta x = x_final - x_initial. Displacement can be thought of as the shortest distance between two points along a straight line, including the direction. For example, if an object moves from a position of 3 meters to 15 meters along a straight path, its displacement is 12 meters in the positive direction.
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3. Understand Distance Traveled

Distance traveled is the total length of the path that an object takes in moving from its initial position to its final position, regardless of the direction. Distance is a scalar quantity, which means it only has magnitude and no direction. It is important to note that distance traveled is different from displacement, as distance only considers the length of the path taken and doesn't take direction into account. For instance, if an object moves 5 meters forward and then 3 meters backward, the distance traveled is 8 meters (5+3), whereas the displacement is just 2 meters (5-3) forward.
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4. Examples to illustrate each term

Let's consider a few examples to illustrate these concepts: Example 1: An object is initially placed at position x=0 meters on a straight line and moves to a new position at x=10 meters. The position of the object at the end is 10 meters from the reference point along the line. The displacement is 10 meters in the positive direction (10-0), and the distance traveled is also 10 meters. Example 2: An object is initially placed at position x=0 meters on a straight line. The object moves 5 meters to the right (positive direction) and then 3 meters to the left (negative direction). In this case, the final position is x=2 meters. The displacement of the object is 2 meters in the positive direction (5-3). However, the distance traveled is the total path length, which is 8 meters (5+3). Understanding these concepts is crucial when solving physics problems related to motion, as it helps in determining the actual movement and distances covered by an object during motion along a straight path.

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