Q.

A rope whose mass supports a block of mass three times that of rope. A pulse is generated in string near lower end. The pulse moves up with acceleration in m/ s 2   

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answer is 5.

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Detailed Solution

v2=Tμ=(L+μx)gμ=Mgμ+gx

a=vdydx=g2=5m/s2 
 

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