Conceptual - Position Vs. Time

[~SPaRtaN~]

Homework Statement

http://img364.imageshack.us/my.php?image=90198228dt0.jpg
Image: http://img364.imageshack.us/my.php?image=90198228dt0.jpg

Which of the following statements are correct/incorrect?
1) The velocity is zero at point 4.
2) At point 6 the velocity is negative.
3) At point 3 the velocity is positive.
4) At points 1 and 7 the velocities are about the same.
5) At point 8 the object is farther from the origin than at any other numbered point.
6) At points 3 and 5 the object is the same distance from the origin.
7) At points 1 and 3 the object is on the positive side of the origin.

Homework Equations

Velocity is the SLOPE of the position-time graph.

The Attempt at a Solution

Tried 2-3 times but some of mine answers are wrong
Herez mine:
1 Incorrect
2 Incorrect
3 Incorrect
4 correct
5 Incorrect
6 Incorrect
7 correct

 

[LowlyPion]

Homework Statement

http://img364.imageshack.us/my.php?image=90198228dt0.jpg
Image: http://img364.imageshack.us/my.php?image=90198228dt0.jpg

Which of the following statements are correct/incorrect?
1) The velocity is zero at point 4.
2) At point 6 the velocity is negative.
3) At point 3 the velocity is positive.
4) At points 1 and 7 the velocities are about the same.
5) At point 8 the object is farther from the origin than at any other numbered point.
6) At points 3 and 5 the object is the same distance from the origin.
7) At points 1 and 3 the object is on the positive side of the origin.

Homework Equations

Velocity is the SLOPE of the position-time graph.

The Attempt at a Solution

Tried 2-3 times but some of mine answers are wrong
Herez mine:
1 Incorrect
2 Incorrect
3 Incorrect
4 correct
5 Incorrect
6 Incorrect
7 correct

Maybe you can describe your thinking on 4) ? Not necessarily saying it's wrong, just want to know how you arrived at it.

 

[~SPaRtaN~]

^at both points velocity is increasing, it looks it is a constant increase in velocity...
actually i don't know may b i m wrong...but do u know the actual answers to it ?

 

[LowlyPion]

^at both points velocity is increasing, it looks it is a constant increase in velocity...
actually i don't know may b i m wrong...but do u know the actual answers to it ?

Sorry, if I confused you, as you had it right and I wanted to make sure you understood it.

 

[~SPaRtaN~]

^its ok dude...can i have ur views, what do u think, what could be the answers?

 

[LowlyPion]

^its ok dude...can i have ur views, what do u think, what could be the answers?

I thought your answers were correct.

 

[~SPaRtaN~]

^no some of em are not...and i don't know which ones

 

[LowlyPion]

^no some of em are not...and i don't know which ones

OK I looked again. And 6 looks like they may be at the same distance though not the same displacement, one being + and the other -.

I thought it was wrong last night and then forgot when I came back later.

 

[~SPaRtaN~]

please somebody here help me on this problem