Determining speed and acceleration magnitude from graph

[malik123]

Homework Statement

http://img44.imageshack.us/img44/598/prob16aaccelx2.gif

1:At 7 sec, the speed is as high as it gets.
2:The acceleration magnitude at 15 sec is ... the acceleration magnitude at 38 sec.
3:The x-acceleration is ... zero at 58 sec.
4:The speed is ... zero at 23 sec.
5:The speed at 46 sec is ... the speed at 73 sec.
6:The x-acceleration is ... zero at 7 sec .

Homework Equations

The answers can be any of the following, True, False, Equal to, less than.

The Attempt at a Solution

1: True, because the speed is the slope of the line, and this is the steepest slope.
2: Less than, because at 15 the acceleration is 0, and the acceleration at 38 is positive
3:Less than, because the car is decelerating
4: Equal to
5: Greater than
6: equal too, slope is constantI can't get all the answers right at once.

If you could help that would be great!

Thanks

 

[berkeman]

The image/attach didn't display. Try again?

 

[malik123]

The image/attach didn't display. Try again?

Thanks, it was showing up for me.

But i will reupload it somewhere,

 

[malik123]

Is the image showing up now?

 

[malik123]

Guys, I need to get this in 1 hour!

Please help correct me!