A wire elongates by l mm when a load W is hanged from it. If the wire goes over a pulley and two weights W each are hung at the two ends, then the elongation of wire will be (in mm).

A wire elongates by l mm when a load W is hanged from it. If the wire

1.	A wire elongates by l mm when a load W is hanged from it. If the wire goes over a pulley and two weights W each are hung at the two ends, then the elongation of wire will be (in mm).
Answer» l 2l zero `l/2` Solution :In CONNECTED system, T =`(2W_(1)W_(2))/(W_(1)+W_(2))` `rArrT=(2xxWxxW)/(2W)`=W This tension PRODUCES EXTENSION 1 mm in the STRING. So correct CHOICE is (a).

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A wire elongates by l mm when a load W is hanged from it. If the wire goes over a pulley and two weights W each are hung at the two ends, then the elongation of wire will be (in mm).

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