Pressure and moments4

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Pressure and moments

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Pressure and moments4

  1. 1. Pressure and MomentsPressure and Moments By M HBy M H
  2. 2. ContentsContents • Pressure……………………………………..Pressure…………………………………….. Slide 3Slide 3 • How to work outHow to work out Pressure…………….Slide 4Pressure…………….Slide 4 • Moments……………..........................SlideMoments……………..........................Slide 55 • How to work out Moments……………SlideHow to work out Moments……………Slide 66 • The end………………………………………The end………………………………………
  3. 3. PressurePressure • Pressure is the force per unit area applied in aPressure is the force per unit area applied in a direction perpendicular to the surface of andirection perpendicular to the surface of an object.object. • Pressure is very useful when trying to know whatPressure is very useful when trying to know what your weight is and going to space because youyour weight is and going to space because you have to know how far you can be from a planethave to know how far you can be from a planet and not being attracted or bounced of it’sand not being attracted or bounced of it’s gravitational force.gravitational force. • Pressure is useful when trying to know whatPressure is useful when trying to know what someone’s blood pressure is. If we never knewsomeone’s blood pressure is. If we never knew what pressure was then people’s lives could bewhat pressure was then people’s lives could be at riskat risk
  4. 4. How to work out pressureHow to work out pressure • Pressure = fore divided by area.Pressure = fore divided by area.
  5. 5. MomentsMoments • Forces that act on objects that have aForces that act on objects that have a fixed point - such as the hinge of a door,fixed point - such as the hinge of a door, or the axle of a wheel - may make thator the axle of a wheel - may make that object rotate. We call the turning effect ofobject rotate. We call the turning effect of a force the moment.a force the moment.
  6. 6. How to work out a momentHow to work out a moment • Moment=Force times the distance formMoment=Force times the distance form the pivot.the pivot. D F M
  7. 7. TheThe EndEnd

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