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  •   Forum  >> Mechanics  >> tention  

    yash asthana  
    Total Posted Questions : 2
        Can a person hanging on an inextensible light string apply tention more than his weight? if yes,how?
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    Total Replies: 3
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    mohit yadav
    Total Posted Answers: 7
     

    hi,vaibhav

    d answer is yes becoz

    when u draw d fbd of d scenario ,consider d man accelerating upwards wid an acceleration A(non-zero and +ve) and weight W and tension T in string den by fbd and applying newton's 2nd law of motion from ground frame [i.e NET EXTERNAL FORCE FROM INERTIAL FRAME=mas of system *acceleration of system ] here if we take man as d system den net ext. force on him iz T-W so we get T-W=MA so T=W+MA (as W IS +VE nd M also +ve so T>W

     

    7/5/2009 5:44:11 AM

    AskiitianExpert Shine
    Total Posted Answers: 512
     

    Hi

    If the person start movin up the string with some acceleration, then the tension in the string wud be greater than the wt of the person. Tension wud be = sum of the massXacceleration and mass x g .

    this u can visualize by drawing a force body diagram of the person.

    7/2/2009 10:54:34 PM

    piyush garg
    Total Posted Answers: 33
     

    draw free body diagram of string two forces are acting on it tension upwards and weight downwords if he apply tension more than his weight he will be lifted updue to inextensible strain is zero

    7/2/2009 9:42:18 PM