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# pressure & application

Published on: Mar 4, 2016

#### Transcripts - pressure & application

• 1. Thrust  The force applied on a surface in a direction perpendicular to the surface Unit = Newton (N)
• 2. Pressure   The effect of thrust per unit area is called pressure. Pressure =thrust/area  Unit – Pascal (Pa)  1 Pa = 1 N / 1m2
• 3. Pressure depends on two factors 1.force(thrust)-more force more pressure  2.area -more area less pressure 
• 4. “The same force produces less pressure if it acts on a large area but can produce less pressure if acts on a small area.”
• 5. Every day observation  1.School bags have wide straps so the weight of bag may fall over a large area of the shoulder of the student producing less pressure on shoulder.
• 6. Sharp knife cuts better than a blunt knife so the force of our hand falls over a very small area of object produces large pressure.
• 7. The tractor have broad tyres so there is less pressure on ground and do not sinking to comparatively soft field.
• 8. It is easier to walk on soft sand if we have flat shoes rather than shoes with sharp heels.
• 9. The foundations of buildings and dams are laid on a larger area to produce less pressure
• 10. >The wooden or concrete sleepers are kept below the railway line. >A wide belt is provided over the wheels of an army tank.
• 11. Submitted to:Mrs. Mamta mam Submitted to :Vikrant choudhary