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Why lines starting from the surface …

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Why lines starting from the surface and terminating at the surface always makes a right angle Give reason

    • Posted by Karishma Singh 7 years, 10 months ago

    CBSE > Class 12 > Physics
    • 3 answers

    Prachi K 7 years, 10 months ago

    Becz work done is zero and cos 90 have value 0 so the angle between is 90 and they are perpendicular

    0Thank You

    Lekha Raj 7 years, 10 months ago

    Same hr

    2Thank You

    Mmmmmmmmmmmmmmmmmmmm Wwwwwwwwwwwwwwwwwwww 7 years, 10 months ago

    Because...... Oh no I Din't understand that question.......

    1Thank You

    ANSWER
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