Explain with the help of given problem of block string motion as to which component of velocity should be resolved in such cases. Why?Methods I am confused between :-Let velocity of string is u. Let velocity of block is v in upwards direction.Method-1Component of velocity of string on each side of block in the direction of motion of block be u cos(theta) .Net summation of components of velocity in direction of motion of block = 2u cos(theta) i.e. { u cos(theta) by both left and right part of string}Ans. v = 2u cos(theta)Method -2Component of velocity of block in the direction of string be v cos(theta) .This implies that u = v cos(theta) .Ans. v = u/( cos(theta))Which of the above methods is correct? Please provide detailed analysis on the concept involved.

Rohan Sachan , 7 Years ago

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