Kinematics, Position time Graph.

[pdot]

finding the velocity of a time that does not start at 0. i have the answer but i do not know how to do it. do i use a tangent or go from point one to point two? sorry for being the least bit descriptive, I'm not a genius.

 

[gneill]

finding the velocity of a time that does not start at 0. i have the answer but i do not know how to do it. do i use a tangent or go from point one to point two? sorry for being the least bit descriptive, I'm not a genius.

You'll have to be the least bit more descriptive.

Can you give a specific example of what you mean?

 

[pdot]

i have a position time graph, going from 0 - 1.0. going up by .1 each centimetre on my metric graph paper. at first i am asked to find how fast the object is moving at .1 hours. the answer is 5.0km/h. i understood that, but then i am asked to find how fast it was for the first .5h . with this being said, i will tell you i am a tenth grade student taking physics 11.

 

[gneill]

So, to clarify, you have a position versus time graph. The x-axis is time, and its scale goes from 0 hours to 1 hour. The y-axis is position, and it goes from what to what? what are the units?

Now, the curve. Is it a straight line? Does it pass though the origin or does it have x or y intercepts?

 

[pdot]

the units are position ( km ) and time ( h ) . the curve accelerates and then stops at one hour. i would like to say sorry, as i am not as smart as you. you seem very intelligent.

 

[gneill]

I'm afraid that so far I can't quite picture the curve from the description so far. "The curve accelerates" could have many interpretations. Does it follow a parabolic curve during the acceleration?

Would it be possible for you to include a diagram?