What was the average speed of the toy car during the two trials to the nearest tenth of a m/s? A) 1.4 m/s B) 0.7 m/s C) 5.6 m/s D) 7.0 m/s

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.

lol

explanation:

answerdmitry mendeleyev made a workable classification of the elements