A uniform rope of their mass density `lamda` and length `l` is coiled on smooth horizontal surface. One end is pulled up by an external agent wit consant vertical velocity `v`. Choose the correct option(s) A. Power developed by external agent as a function of `x` is `P=lamdaxgv`B. Power developed by external agent as a function of `x` is `P=(lamdav^(2)+lamdaxg)v`C. Energy lost during the complete lift of the rope is zeroD. Energy lost during the complete lift of the rope is `(lamdalv^(2))/2`

A uniform rope of their mass density `lamda` and length `l` is coiled

1.	A uniform rope of their mass density `lamda` and length `l` is coiled on smooth horizontal surface. One end is pulled up by an external agent wit consant vertical velocity `v`. Choose the correct option(s) A. Power developed by external agent as a function of `x` is `P=lamdaxgv`B. Power developed by external agent as a function of `x` is `P=(lamdav^(2)+lamdaxg)v`C. Energy lost during the complete lift of the rope is zeroD. Energy lost during the complete lift of the rope is `(lamdalv^(2))/2`
Answer» Correct Answer - B::D `F` applied by external agent `=` Weight `+` thrust force `=lamdaxg+lamdav^(2)` Energy lost in the complete lift `=W_(F)-DeltaK.E. -DeltaU=(lamda lv^(2))/2`

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