The diagram below represents the cantilever at the Legon swimming pool side. The Structure is made of wood and is uniform. If the mass of the structure is 750 kg, calculate the minimum cross-sectional area of each of the supports, assuming a safety factor of 7.0.

glass has been rated on the mohs scale as 5.5

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.

continuous conducting path for current, power supply