An important facility for 9th class students preparing for short questions physics 9th class chapter 7 of BISE. Get hundreds of questions to prepare and get better marks in 9th physics
0
Our database contains a total of 0 questions for physics Short Questions. You’ll prepare using this huge databank.
Question: 1
Define Pressure and relations.
Answer: 1
1-31Pressure: Pressure is defined as force per unit area. It is denoted by "P".
Mathematically Form:
If force "F" is applied on area "A" the pressure is.
Pressure = Force /Area
P = F/A
Relation between pressure and force:
Eq P =F/A elarly shows that pressure is directly proportioal to the applied force. it means by appling greater force.pressure will be greater.
Relation between Pressure and area:
Eq (i) also shows that pressure is inversely proportional to each other. It means that smaller the area for a given foce. the greater will be the pressure. There fore, a force , a force exeeted over a small area produces more pressure than the same amount force exerted over a large area.
For Example:
A grid wearing high heel pointed shows exrts more pressure on the ground than the one wearing flate shoes.
Unit: The SI unit of pressure is Pascal which is equal to Netwon per square meter