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 + Bx 2 , is given by
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
C
F = 
= Gm 
= Gm 
= Gm 
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