If an object moves along a straight line, its motion can be represented by a velocity-time graph. The gradient of the line is equal to the acceleration of the object .
What does it mean if velocity is a straight line?
On a velocity-time graph a horizontal (flat) line indicates the object is travelling at a constant speed. A straight diagonal line indicates the object’s velocity is changing . ... The general rule of thumb is if the object is going from a high speed to a low speed, it is decelerating.
What does a straight horizontal line on a velocity-time graph mean?
Object is moving at a constant velocity in the + direction. Velocity-Time Graphs. A horizontal line on the V-T graph means constant velocity .
What does a straight line on a time graph mean?
time graph reveals pertinent information about an object’s velocity. For example, a small slope means a small velocity; a negative slope means a negative velocity; a constant slope (straight line) means a constant velocity ; a changing slope (curved line) means a changing velocity.
What does a vertical line on a velocity graph mean?
A velocity-time graph shows the speed and direction an object travels over a specific period of time. Velocity-time graphs are also called speed-time graphs. The vertical axis of a velocity-time graph is the velocity of the object . The horizontal axis is the time from the start.
What is the velocity of a straight horizontal line?
Car 1 – Position and velocity graphs
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.
What does the horizontal line on a graph mean?
In more simple terms, a horizontal line on any chart is where the y-axis values are equal . If it has been drawn to show a series of highs in the data, a data point moving above the horizontal line would indicate a rise in the y-axis value over recent values in the data sample.
What does the slope of a velocity-time graph indicate?
The principle is that the slope of the line on a velocity-time graph reveals useful information about the acceleration of the object . If the acceleration is zero, then the slope is zero (i.e., a horizontal line). ... The slope of a velocity-time graph reveals information about an object’s acceleration.
What is difference between speed and velocity?
Speed is the time rate at which an object is moving along a path, while velocity is the rate and direction of an object’s movement. Put another way, speed is a scalar value, while velocity is a vector. ... In its simplest form, average velocity is calculated by dividing change in position (Δr) by change in time (Δt).
Does constant velocity mean no acceleration?
If an object is changing its velocity -whether by a constant amount or a varying amount – then it is an accelerating object. And an object with a constant velocity is not accelerating .
Can a position time graph have a vertical line?
No. A vertical section in a position-time graph would mean that the object (assumed to be a point particle) occupies more than one position at the same time . This is not possible. It can occupy one position at many different times, but it cannot occupy more than one position at one instant in time.
What is the slope of velocity vs time graph?
First, the slope of the velocity-time graph is equal to the object’s acceleration . In this case, the object was moving at a constant velocity during each segment of it’s motion. Second, the area under the graph is equal to the object’s displacement during that time interval.
What is position time graph 11?
Hint: Position- time graphs are generally used to describe the motion that the object is following . We take x-axis to denote time and y-axis to denote its position. The velocity is the slope of this position-time graph. As the steepness of the graph is increasing it has greater the value of its velocity.
What does constant acceleration look like on a velocity vs time graph?
In a velocity-time graph, acceleration is represented by the slope, or steepness , of the graph line. ... If the line is horizontal, as it is between 4 and 7 seconds, velocity is constant and acceleration is zero.
In what situation is the velocity time graph a straight line with negative slope?
In retarded motion the velocity time graph is a straight line with negative slope. Explanation: Negative acceleration is called retardation. If the velocity of a body is decreasing with respect to time, the acceleration is said to be negative.
