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A rod PQ of mass, area of cross section ...

A rod PQ of mass, area of cross section A, length l and young's modulus of elasticity Y is lying on a smooth table as shown in figure. A force Fis applied at P. Find
(a) tension at a distance x from end P,
(b) longitudinal stress at this point,
(c) total change in length and
(d) total strain the rod.

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