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The string beween blocks of mass m and 2m is massless and inextensible. The system is suspended by a massless spring as shown. If the string is cut find the magnitudes of accelerations of mass 2m and m (immediately after cutting): |
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Answer» g.g  By equilibrium of 2m, T=2 mg - T From (i) & (ii), `T = 2mg - mg = mg` When the string is cut: For mass m:`F_(net) = ma_(m)` `IMPLIES mg = ma_(m)` `impliesa_(m)=g` For mass 2m :`F_(net) = 2ma_(2m)` ` implies 2mg - T = 2ma_(2m )` `= 2mg - mg = 2ma_(2m)` `impliesa_(2m)=(g)/(2)` HENCE choice is (C). |
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