What is the x component of ... ?

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1. Sep 1, 2015

Manh

What is the x component of (+2m)ι^?
Express your answer with the appropriate units.
x = ____ __
* My attempted answer was: +2m

What is the x component of (+2m/s)ι^?
Express your answer with the appropriate units.
vx = ____ __
* My attempted answer was: +2m/s

What is the x component of (−2m/s)ι^?
Express your answer with the appropriate units.
vx= ____ __
* My attempted answer was: -2m/s

However, my answers were incorrect and I think they may have incorrect units. Can anybody tell me what I did wrong? Thank you!

2. Sep 1, 2015

BvU

I had to read twice to see the $\hat\imath$.
Perhaps you are working with a computer ? Or did your teacher mark tha answers as wrong ? Probably not.

Perhaps the program wants a space between the 2 and the dimension (as in the template --- --) ?

3. Sep 1, 2015

Manh

The teacher told me that I should ignore positive signs in my answers then they would be correct. Thank you for your interest in helping me!

4. Sep 2, 2015

BvU

So you were doing just fine. Good !