# Homework Help: Second force problem

1. Oct 1, 2012

### phunphysics2

Can somebody please check my work? Any and all help is certainly appreciated!

F=ma is used

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2. Oct 1, 2012

### tiny-tim

hi phunphysics2 !

your magnitude is correct, i'm not sure about your direction since i can't see which way you're measuring it

(but you need to write it out much better than this if you're going to pass an exam )

(and i don't understand how you managed to draw a diagram of this without any arrows in it)

3. Oct 1, 2012

### phunphysics2

1. The box is accelerating COMPLETELY to the right. I did not draw in the arrow at 0 degrees but it is noted in the problem
2. I used the standard xy plane for this problem. Origin is in the middle of the box and the arrow Q rests along the 90 degree mark.

The box that I drew was given to us as a picture in the problem

Is the vector notation correct?

p.s. I am a 2nd year English major taking calc-engineering physics. Scored 5% higher than the average in class, which was a passing grade

4. Oct 1, 2012

### tiny-tim

hi phunphysics2!
so j is up

then your second force must have negative j
you can either write everything in a continuous string of maths,

or you can write it out as a piece of english

but not as a disjointed collage