# Homework Help: Determining speed and acceleration magnitude from graph

1. Sep 11, 2009

### malik123

1. The problem statement, all variables and given/known data

http://img44.imageshack.us/img44/598/prob16aaccelx2.gif [Broken]

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 .

2. Relevant equations

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

3. 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 constant

I can't get all the answers right at once.

If you could help that would be great!

Thanks

#### Attached Files:

• ###### prob16a_accelx2.gif
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Last edited by a moderator: May 4, 2017
2. Sep 11, 2009

### Staff: Mentor

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

3. Sep 11, 2009

### malik123

Thanks, it was showing up for me.

But i will reupload it somewhere,

4. Sep 11, 2009

### malik123

Is the image showing up now?

5. Sep 11, 2009

### malik123

Guys, I need to get this in 1 hour!