Question regarding Negative Velocity

In summary, On a Position-Time Graph, if you start with a negative velocity and slowly increase in velocity, your position may increase from negative to positive depending on the initial position. The Velocity-Time Graph may look like a parabola, but the Position-Time Graph may vary depending on the initial position.
  • #1
Drewski
2
0
On a Position-Time Graph, if you start with a negative velocity and slowly increase (Accelerate) in velocity, would you have a negative position that increases to a positive position?

In other words, would it look like this?

rmp8hf.jpg


Velocity-Time Graph on the Right, Position Time-Graph on the Left. Are they correct?
 
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  • #2
If your acceleration is in the positive direction, then your v/t graph is correct but your x/t graph is wrong: it should look like a parabola, not two straight lines.
 
  • #3
Drewski said:
would you have a negative position that increases to a positive position?

It depends on the initial position. If the initial position is zero, then you have something like your graph (I assume you meant to draw a smooth parabola but were limited by your tools :wink:). If the initial position is positive and "large" enough, the graph stays above the horizontal axis and the position never becomes negative.
 

Related to Question regarding Negative Velocity

1. What is negative velocity?

Negative velocity is a measure of an object's speed and direction, where the object is moving in the opposite direction of a reference point. It is denoted by a negative value in a velocity vector.

2. How is negative velocity different from positive velocity?

Negative velocity indicates that an object is moving in the opposite direction of a reference point, while positive velocity indicates that the object is moving in the same direction as the reference point. In terms of magnitude, negative velocity has a smaller value than positive velocity.

3. Can an object have a negative velocity and positive acceleration?

Yes, it is possible for an object to have a negative velocity and positive acceleration. This means that while the object is moving in the opposite direction of the reference point, its speed is increasing in that direction.

4. How is negative velocity represented graphically?

Negative velocity is represented by a line on a velocity-time graph that has a negative slope, with the steeper the slope, the greater the magnitude of the negative velocity. The line will be below the x-axis if time is plotted on the horizontal axis and velocity on the vertical axis.

5. What are some real-life examples of negative velocity?

Some real-life examples of negative velocity include a car moving in reverse, a ball thrown downwards, or a person walking backwards. These objects are all moving in the opposite direction of a reference point, making their velocity negative.

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