If r1= {3i – 2j + 5k}m, r2 = {4i -5k)m, r3= {3i – 2j + 5k}m. Determine the magnitude and dierction of of (r = 2r1- r2+ 3r3).​

audio tape

explanation:

the box does not move because you need to use a force greater than 300 n. you are only using 50 n. it needs to at least be 301 n for the box to move because then it is an unbalanced force and it will move the way that the greater force is pushing it. if you use only 300 n it will be a balanced force and will not move because the force you are exerting on the   box is the same as its force.

hope this !

im sorry if i went too in depth, i am going to include a link to a video on khan academy that will explain this.   hope that you like the video and that it explains more in detail to you.

that is the link.

a=d/t

a="triangle"v/t

explanation:

a = acceleration

snell's law

refractve index = sin incidence / sin refraction