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A straight rod of length `L` extends from `x=a` to `x=L+a`. Find the gravitational force exerts on a point mass `m` at `x=0` is (if the linear density of rod`mu=A+Bx^(2)`)

A

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

B

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

C

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

D

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

Text Solution

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The correct Answer is:
A
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