What does it mean when velocity goes from positive to negative?

The sign of the velocity depends on the coordinate system chosen to define the position. A positive velocity simply means that the object is moving in the positive direction, as defined by the coordinate system, while a negative velocity means the object is traveling in the other direction.

How can you tell if acceleration is constant from a velocity-time graph?

Features of the graphs When an object is undergoing constant acceleration , the line on the graph is straight but sloped. Curved lines on velocity-time graphs also show changes in velocity, but not with a constant acceleration or deceleration . The diagram shows some typical lines on a velocity-time graph.

Is constant velocity positive or negative?

*If the velocity is constant, then the slope is constant (i.e., a straight line). *If the velocity is positive, then the slope is positive (i.e., moving upwards and to the right). *If the velocity is negative, then the slope is negative (i.e., moving downwords and to the right).

What does it mean when your velocity-time graph is sloping down in the negative?

In a velocity-time graph, acceleration is represented by the slope of the graph line. If the line slopes downward, like the line between 7 and 10 seconds, velocity is decreasing and acceleration is negative.

What does it mean when velocity is negative?

An object which moves in the negative direction has a negative velocity. If the object is slowing down then its acceleration vector is directed in the opposite direction as its motion (in this case, a positive acceleration).

How can you tell if a velocity graph is constant?

If you are given a velocity graph and it is horizontal (blue and green lines below), then the velocity is constant. If the graph is anything but horizontal, then the velocity is not constant. If you are given an acceleration function or graph and it is zero (green line below), then the velocity is constant.

What is constant velocity graph?

Constant velocity means the velocity graph is horizontal, equal to 11.11 m/s at all times. A constant velocity means the position graph has a constant slope (of 11.11 m/s). It’s a straight line sloping up, and starting below the origin. The displacement is the area under the curve of the velocity graph.

Can a constant velocity be negative?

A position-time graph for an object which is moving with a constant, negative velocity is shown below. A negative, constant velocity is represented by a line with constant slope (straight) and negative slope (downwards sloping).

When is velocity positive on a graph?

Since the graph is a velocity-time graph, the velocity would be positive whenever the line lies in the positive region (above the x-axis) of the graph. Similarly, the velocity would be negative whenever the line lies in the negative region (below the x-axis) of the graph.

Is negative velocity going up or down?

Can velocity be negative on a velocity time graph?

The answers to these questions hinge on one’s ability to read a graph. Since the graph is a velocity-time graph, the velocity would be positive whenever the line lies in the positive region (above the x-axis) of the graph. Similarly, the velocity would be negative whenever the line lies in the negative region (below the x-axis) of the graph.

When an object is undergoing constant acceleration the line on the graph?

When an object is undergoing constant acceleration, the line on the graph is straight but sloped. Curved lines on velocity-time graphs also show changes in velocity, but not with a constant acceleration or deceleration. The diagram shows some typical lines on a velocity-time graph. The steeper the line, the greater the acceleration of the object.

What are the features of a constant velocity graph?

Features of the graphs When an object is moving with a constant velocity, the line on the graph is horizontal. When the horizontal line is at zero velocity, the object is at rest. When an object is undergoing constant acceleration, the line on the graph is straight but sloped.

What does the slope of a velocity-time graph represent?

Note that a motion described as a changing, positive velocity results in a sloped line when plotted as a velocity-time graph. The slope of the line is positive, corresponding to the positive acceleration.