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Need help. Physics

Discussion in 'Cambridge O Levels' started by Zonaska, May 26, 2010.

  1. Zonaska

    Zonaska

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  3. |Riddler|

    |Riddler|

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    taking moments about the wall
    1*18000 equals to 0.5*F
    F equalsto 18000 divided by 0.5
    check the marking scheme answer should be 36000 N
  4. Zonaska

    Zonaska

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  5. |Riddler|

    |Riddler|

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    no problem
  6. Mukhtar

    Mukhtar

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    Force is acting from the center, so to find the center of 3m slab, we will divide 3 by 2 so we get 1.5. We note that 0.5 of the length of the slab is on the right side of the wall. So if we sbtract 0.5 from 1.5 we will get 1 which is the distance from wall from left side where the force is acting. Considering wall as pivot we will apply the formua 1 x 18000 = 0.5 x a. (a is unknown). So we will get a = 36000N.
    Check this out : http://www.paperspoint.net/o_level/2009 ... 9_ms_2.pdf

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