Disk A has a moment of inertia of 4.91 kg m2 and an angular velocity of 3.80 rad s Disk B is rotating with an angular velocity of 9.07 rad s The two disks are then linked together without the aid of any external torques so that they rotate as a single unit with an angular velocity of 2.66 rad s The axis of rotation for this unit is the same as that for the separate disks What is the moment of inertia of disk B

This link has the question answered for you.Can you use the link if not message me and I will edit my answers.

https://www.chegg.com/homework-help/questions-and-answers/two-disks-rotating-axis-disk-moment-inertia-353-kg-m2-angular-velocity-324-rad-s-disk-b-ro

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.