On the problem of physical pressure, we need the whole process -- 1. The average pressure produced by the water jet from the spray gun on the coal seam is 10 to the fifth power Pa. the pressure on the area of 1 square centimeter of the coal seam surface is calculated. 2. Stapler is a common office tool, which applies a lot of pressure knowledge. Find a stapler, carefully observe its structure, and analyze how it applies the pressure knowledge

On the problem of physical pressure, we need the whole process -- 1. The average pressure produced by the water jet from the spray gun on the coal seam is 10 to the fifth power Pa. the pressure on the area of 1 square centimeter of the coal seam surface is calculated. 2. Stapler is a common office tool, which applies a lot of pressure knowledge. Find a stapler, carefully observe its structure, and analyze how it applies the pressure knowledge

1.F=PS=10^5*10^-4=10N
2. The contact surface between the top of the iron sheet of the stapler and the book is very small, so the pressure on it is very high, which can easily penetrate the book and achieve the purpose of stapling