A straight rod of length L extends from x = a to x=L+a. The gravitational force it exerts on a point mass 'm' at x = 0 , if the mass per unit length of the rod is A+ Bx², is given by

Question:

A straight rod of length L extends from x = a to x=L+a. The gravitational force it exerts on a point mass ‘m’ at x = 0 , if the mass per unit length of the rod is A+ Bx², is given by

Options :

(a) Gm[A(1/a+L-1/a)-BL]
(b) Gm[A(1/a+L-1/a)+BL]
(c) Gm[A(1/a-1/a+L)+BL]
(d) Gm[A(1/a-1/a+L)-BL]

Answer :

Answer Steps :

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