A light inextensible string that goes over a smooth fixed pulley as shown in the figure connects two blocks of masses 0.36 π‘˜π‘” and 0.72 π‘˜π‘”. Taking 𝑔 = 10 π‘š/𝑠 2 , find the work done (in joules) by the string on the block of mass 0.36 π‘˜π‘” during the first second after the system is released from rest

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Question: A light inextensible string that goes over a smooth fixed pulley as shown in the figure connects two blocks of masses 0.36 π‘˜π‘” and 0.72 π‘˜π‘”. Taking 𝑔 = 10 π‘š/𝑠 2 , find the work done (in joules) by the string on the block of mass 0.36 π‘˜π‘” during the first second after the system is released from rest

(A) 6 π½π‘œπ‘’π‘™π‘’

(B) 5 π½π‘œπ‘’π‘™π‘’

(C) 8 π½π‘œπ‘’π‘™π‘’

(D) 2 π½π‘œπ‘’π‘™π‘’

Answer: Option (C)

Solution:

A light inextensible string that goes over a smooth fixed pulley as shown in the figure connects two blocks of masses 0.36 π‘˜π‘” and 0.72 π‘˜π‘”. Taking 𝑔 = 10 π‘š/𝑠 2 , find the work done (in joules) by the string on the block of mass 0.36 π‘˜π‘” during the first second after the system is released from rest
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