A 68.8 kg man sits in a 5.0 kg chair so that his weight is evenly distributed on the legs of the chair. Assume that each leg makes contact with the floor over a circular area with a radius of 0.94 cm. What is the pressure exerted on the floor by each leg

Pressure in N/cm² = 66.46 N/cm²

Explanation:

Total weight of the man and the chair is 68.8 + 5 = 73.8 kg

But the weight is evenly distributed to the legs of the chair with four legs.

Each tension or load on a leg of the chair is 73.8/4= 18.45 kg

The load on each chair is 18.45*10 = 184.5 N.

Pressure = load/area

Area = πr²

area = π*0.94²

Area = 2.776 cm²

pressure = load/ area

Pressure = 184.5/2.776

Pressure = 66.46 N/cm²

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 ima (higher than 1m) will be greater than the ima with the height of 1m.