Help with velocity vs, time graph

[madeeeeee]

Homework Statement

Draw a velocity vs. Time graph Please I REALLY need HELP!?
7. Sketch a velocity versus time graph of Tommy in his car for the following situation. [5]

• He is waiting at a traffic light.
• He accelerates up to the speed limit.
• Travels at the speed limit for a while.
• Decelerates when he sees a red light.
• Stops at the light for a while.

Homework Equations

There are no equations

The Attempt at a Solution

I don't know how to draw this!
I need help
please!

 

[Londoncalling]

Okay, so if he is waiting at a traffic light, his velocity should=0. Time is still passing, so its a straight line but it sits on top of the x-axis (y=0). When he accelerates, his velocity will raise over time, so that's a positive diagonal line. Now he is cruising at a constant velocity. That's a straight line at some positive value of y. When he decelerates, the line goes downwards (make a negative slope) and it will eventually hit zero, where it will just go along the x-axis again.

 

[kerimek]

Don't worry, I can help you with this! Drawing a velocity versus time graph can be a bit tricky, but once you understand the concept, it will become easier. First, let's understand what a velocity versus time graph represents. It shows the relationship between an object's velocity (speed and direction) and time. The slope of the graph represents the object's acceleration, while the area under the curve represents the distance traveled.

Now, let's apply this to Tommy's situation. Since he is waiting at a traffic light, his velocity is zero. This means that the graph will start at the origin (0,0). As he accelerates up to the speed limit, his velocity will increase at a steady rate. This will result in a straight, diagonal line on the graph with a positive slope. Once he reaches the speed limit, the line will become horizontal, indicating that he is traveling at a constant velocity.

When Tommy sees a red light and begins to decelerate, the line will start to slope downwards. This means that his velocity is decreasing. Once he comes to a stop at the light, the line will become horizontal again, indicating that his velocity is now zero.

To summarize, the graph will have three sections: a diagonal line for acceleration, a horizontal line for constant velocity, and a diagonal line for deceleration. It should look something like this:

[insert graph]

I hope this helps you understand how to draw a velocity versus time graph. Remember, the key is to understand the concept and apply it to the situation given. Good luck with your homework!