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A wire of length l and mass m is bent in the form of a semicircle. The gravitational field intensity at the centre of semicircle is

(a) Gm/πl along x-axis

(b) Gm/πl along y-axis

(c) 2πGm/l2 along y-axis

(d) 2πGm/l2 along x-axis

1 Answer

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Best answer

Correct option (c) 2πGm/l2 along y-axis

Explanation :

Consider two small elements each of length

dl = rdθ symmetrically πr = l

Resolve the elemental field intensities,

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