So j is up, negative j for second force?

[phunphysics2]

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

F=ma is used

 

[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)

 

[phunphysics2]

Thanks for your response
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

 

[tiny-tim]

hi phunphysics2!

2. I used the standard xy plane for this problem.
…
Is the vector notation correct?

so j is up

then your second force must have negative j

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

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 ​