A particle moves in a circular orbit under the action of a central attractive force inversely proportional to the distance ′𝑟′. The speed of the particle is

Question : A particle moves in a circular orbit under the action of a central attractive force inversely proportional to the distance ′𝑟′. The speed of the particle is

(A) Proportional to 𝑟 2

(B) Independent of 𝑟

(C) Proportional to 𝑟

(D) Proportional to 1/𝑟

Answer : option (B)

Solution :

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