A rod of length L and mass M is pulled by a force F1 at its one end. Find tension at a distance y from the end where F1 acts. 

(A) F1(1 -y/L) 

(B) F1(y/L) 

(C) F1(1 + y/L) 

(D) None of these

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1 Answers

(A) F1(1 -y/L) 

Explanation:

acceleration of string =F/M, 

mass of portion of string between distance y and other end of string=M(1-y/L). 

tension at distance y=M(1-y/L)F/M

=F(1-y/L)

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