Un objet suit un mouvement rectiligne en étant poussé par une force de 10 newtons et en subissant une force de frottement cinétique de 8 newtons. L'objet possède une accélération de 2 m/s2 au cours de ce mouvement. Quelle est sa masse en kg?

answer: pseudoscience

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.

answer a fan shaped mass of sediment deposited at the base of a mountain front do to an abrupt change in stream gradient;