# Homework Help: Need Help with Conversion Problem

1. Feb 2, 2010

### torda87

A vehicle moves in a straight line with an acceleration of 7km/h^2. By how much does the speed change each second? Answer in units of km/h

Was trying to convert to seconds and got 0.0019km/s but not sure from there.

If someone could help that would be great.

2. Feb 2, 2010

### temaire

I believe your answer is right. Just fix up your units.

3. Feb 2, 2010

### torda87

I tried the answer and supposedly it is wrong. 0.0019km/s = 7km/h tried both and still got wrong answer. I am really confused.

4. Feb 2, 2010

### temaire

The number 0.0019 is right, but not the units km/s.

5. Feb 2, 2010

### torda87

If i convert back to hours then 0.0019km/s is 7km/h. Not sure if that is what you meant?

6. Feb 2, 2010

### temaire

What I meant is that for you final answer, the number 0.0019 is correct, but it is not followed by the unit km/s. Rather, it is followed by the unit km/h. So the answer is 0.0019 km/h.

7. Feb 2, 2010

### torda87

My homework is for an online course and the units do not matter in the answer section. Unfortunately it says 0.0019 is a wrong answer.

8. Feb 2, 2010

### temaire

Were you supposed to put in a certain number of sig digs? Because the answer is 7/3600.