Need Help with Conversion Problem

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Homework Help Overview

The discussion revolves around a conversion problem related to the acceleration of a vehicle moving in a straight line, specifically focusing on how to express the change in speed per second in appropriate units.

Discussion Character

  • Exploratory, Assumption checking, Mixed

Approaches and Questions Raised

  • Participants explore unit conversions between km/h and km/s, questioning the correctness of their calculations and the implications of unit choice. There is confusion regarding the relationship between acceleration and speed change over time.

Discussion Status

Participants are actively discussing the conversion of units and the validity of their answers. Some have provided guidance on unit correctness, while others express confusion about the expected format of the answer and the significance of significant digits.

Contextual Notes

There are constraints related to the homework being for an online course, where unit specifications may not be strictly enforced, leading to additional confusion among participants.

torda87
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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.
 
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I believe your answer is right. Just fix up your units.
 
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.
 
The number 0.0019 is right, but not the units km/s.
 
If i convert back to hours then 0.0019km/s is 7km/h. Not sure if that is what you meant?
 
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.
 
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.
 
Were you supposed to put in a certain number of sig digs? Because the answer is 7/3600.
 

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