In a block spring system m=0.25 kg and k=4n/m. at t 0.15s the velocity is -0.174 m/s and the acceleration is 0.877 .write an expression for the displacement as a function of time X (t)

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.

no

explanation:

no i dont know how to solve this you should probably try to google the answer

third one with arrows on top of each other going the same direction