9.5 Pressure calculations

9.5 Pressure calculations• Pressure is the quantity that tells us how

concentrated a force is when it presses on an area.

• Here is the equation which is used to calculate

pressure, written in words and in symbols:

Pressure= 𝑓𝑜𝑟𝑐𝑒

𝑎𝑟𝑒𝑎p =

𝐹

𝐴P= pressure

F= force

A= area

Example

Unit of pressure

• The unit of pressure is the Pascal (Pa). 1 Pa is the same as 1N/𝑚2.

• We can write the answer to the example above as:

Pressure=2Pa

Example

Calculating force

• We can rearrange the equation for pressure like this:

force = pressure × area F=P×A

Calculating force

Question 1

Question 2

Question 3

Question 4

Summary

1. Pressure=𝑓𝑜𝑟𝑐𝑒

𝑎𝑟𝑒𝑎2. Force=pressure • area

Homework1. Өөрсдийнхөө гарын алга, хөлний ул, гуталтай хөлний улныхаа

газарт учруулах даралтыг тооцоолох.