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17 February, 06:36

You have a box of pencils and each one has a cross-section of 0.002 m2. The maximum stress that each pencil can take is 22,500 pascals. How many pencils could be broken at once by a force of 135 newtons?

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  1. 17 February, 07:06
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    Stress = force applied / cross-sectional area

    Stress = 22,500 pa, force = 135 N

    cross-sectional area = 135/22,500 = 0.006

    let number of pencils be n

    0.002*n = 0.006

    n = 3 pencils
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