Dois blocos A e B, de massas respectivamente iguais a 20 kg e 5 kg, estão apoiados em uma superfície horizontal perfeitamente lisa, conforme apresentado na figura abaixo. Uma força constante e horizontal de intensidade 50N passa a atuar sobre o bloco A. Determine: a) a aceleração adquirida pelo sistema
b) a intensidade da força que o bloco A exerce no bloco B

the cellphone, they would then know if the killer would have contacted them or always hated them. or if it was a breakup. but if that is not the case, then it would be the clothing. to put in a bullet, it would have to be put in by hands. hands have finger prints which, would have giving you the answer of who done it.

explanation:

their crystal patterns have been disrupted by stress

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.