# Homework Help: Velocity Time Graph

1. Feb 19, 2017

### aatari

• Member advised to use the homework template for posts in the homework sections of PF.
Hi Guys,

I have attempted the question below and would greatly appreciate if I can get some feedback.

A dog's position is recorded in the graph below. Determine the velocity of the dog in all three segments. Sketch the corresponding Velocity-Time Graph. Please See the attached image.

Here are the velocities that I got:

A = 2 m/s
B = 0 m/s
C = -2.42 m/s

Now for the graph that I will make for velocity-time. Do I just use 10, 20, and 28.25 as x-values and then 2, 0, and -2.42 as y-values?

#### Attached Files:

• ###### Capture.PNG
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2. Feb 19, 2017

### TomHart

For c, it looks like he moves 15 meters in 6.667 seconds. Edit: -> It looks like it intersects exactly where those two gridlines meet.

3. Feb 19, 2017

### aatari

So you are saying the dog doesnt go all the to 0? So if thats the case is the velocity then 2.27 m/s?

4. Feb 19, 2017

### ehild

The y values are 20 m, 20 m and 0 m, but it is more accurate to read Δx and Δy from the blue triangle.

5. Feb 19, 2017

### TomHart

The dog definitely goes to back to y = 0. I am just saying that the point x=26.6666, y = 5 is a lot easier to read than the point at y=0.

6. Feb 19, 2017

### aatari

Ok that is interesting. Thank you guys!!

7. Nov 13, 2017

### Hazem Mansour

How did you get this number?
C = -2.42 m/s