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# Pressure on surface

Published on: Mar 4, 2016
Published in: Education      Business      Entertainment & Humor

#### Transcripts - Pressure on surface

• 1. Pressure on a surfacePressure on a surface P = Normal force / areaP = Normal force / area Unit: NmUnit: Nm-2-2 S.I. unit: Pascal (Pa)S.I. unit: Pascal (Pa) Scalar quantityScalar quantity Normal force
• 2.  P = force / surface area in contactP = force / surface area in contact P = weight / base areaP = weight / base area
• 3.  Area Increase, Pressure decreaseArea Increase, Pressure decrease Area decrease, Pressure increaseArea decrease, Pressure increase
• 4. θθF FcosθθP = Fcosθθ / Area/ Area
• 5. Application ofApplication ofPressure in our dailyPressure in our dailylifelife
• 6. Area Increase, Pressure decreaseArea Increase, Pressure decrease Snow shoes – broad base to reduce pressure –Snow shoes – broad base to reduce pressure –prevent sinking into the snow.prevent sinking into the snow.
• 7.  Large elephant leg – able to walk on muddyLarge elephant leg – able to walk on muddyground without sinkingground without sinking
• 8.  Tractor’s tyreTractor’s tyre
• 9.  Broad based foundation of buildingBroad based foundation of building
• 10. Area decrease, Pressure increaseArea decrease, Pressure increase Knife, scissors, nail, thumbtacksKnife, scissors, nail, thumbtacks Ice skating bootIce skating boot
• 11.  Foot ball boots with studsFoot ball boots with studs
• 12.  Woodpecker – sharp beak enable it to pierce andWoodpecker – sharp beak enable it to pierce andchip tree barkchip tree bark