• Chandra dhawan Best Answer
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    Chandra dhawan
    see attached link and file....
  • Vaishali sharma thankyou
    see solution dear
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    Vaishali sharma
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  • Ruby negi thankyou
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  • Chandra dhawan
    see attached file also
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    Chandra dhawan
    its also very helpful
  • Ghost.
    Option( b) is correct there are two kind of force ,one due to mass laid on surface, and other by motion of chain falling on surface.. see attachment.
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  • Deepak singh
    option b is correct
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  • Chandra dhawan
    hope you got it
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