Alarge man sits on a four-legged chair with his feet off thefloor. the combined mass of the man and chair is 95.0 kg. if thechair legs are circular and have a radius of 0.400 cm at the bottom, what pressure does each legexert on the floor?

Explanation:

The total force exerted by the man on the chair is equal to his weight:

where m=95.0 kg is the man's mass and g=9.8 m/s^2. Substituting,

Since there are 4 legs, we can assume that the force is equally distributed over the 4 legs; so the force supported by each leg is

The radius of each leg is , so the area of each leg is

And the pressure exerted on each leg is equal to the ratio between the force supported by each leg and the area:

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.