A spring is hung from the ceiling. A 0.410-kg block is then attached to the free end of the spring. When released from rest, the block drops 0.126 m before momentarily coming to rest, after which it moves back upward. Required:

a. What is the spring constant of the spring?

b. Find the angular frequency of the block 's vibrations.

since you're a real machine, your ama is always less than your ima, because you can never totally eliminate friction.

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.

the answer is 12 as i may remember

: )