Two planets undertake uniform circular motion around a star. For the two planets, the mass, speed and distance from the star's center are respectively m, v, r and m', v', r'. If r' = 4r, the ratio T'/T of the periods of revolution of the planets is:
(A) 8
(B) 1
(C) 4
(D) 1/4
(E) 1/2

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24-07-2024
Physics

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Two planets undertake uniform circular motion around a star. For the two planets, the mass, speed and distance from the star's center are respectively m, v, r and m', v', r'. If r' = 4r, the ratio T'/T of the periods of revolution of the planets is:
(A) 8
(B) 1
(C) 4
(D) 1/4
(E) 1/2

Sagot :

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