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A bob is pulled sideway so …

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A bob is pulled sideway so that string become parallel to horizontal and released. Length of the pendulum is 2m. If due to air resistance loss of energy is 10% what is the speed with which the bob arrives the lowest point ?

    • Posted by Laxmi Singh 5 years, 2 months ago

    CBSE > Class 11 > Physics
    • 1 answers

    Avinash Singh 8 years, 2 months ago

    l=2m = h PE=mgh=2mg loss in E=10% now, PE=9/10x 2mgh PEat the highest pt.=KE at lowest point 9/10x 2mg=1/2x mv2 hence now calculate th value of v where g=10 ans 6

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