When a box rests on a round sheet of wood on the ground, it exerts an average pressure p on the wood. if the wood is replaced by a sheet that has half the diameter of the original piece, what is the new average pressure?

Explanation:

It is given that, when a box rests on a round sheet of wood on the ground, it exerts an average pressure p on the wood. Let A is the area of box having radius r.

Pressure is given by,

If the wood is replaced by a sheet that has half the diameter of the original piece,

So, new pressure is four times of the initial pressure. Hence, this is the required solution.

c. magnitude and direction