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A straight of length L extends from x=a ...

A straight 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

`Gm(a(1/alpha-1/(alpha+l))+bl)`

B

`(Gm(a+bx^2))/l^2`

C

`Gm(alpha(1/a-1/(a+l)+bl)`

D

`Gm(a(1/(alpha+l)-1/alpha))+bl)`

Text Solution

Verified by Experts

The correct Answer is:
A
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