A spherical planet has a mass Mp and diameter Dp. A particle of mass

A Spherical Planet Has A Mass Mp And Diameter Dp Physics QuestionA Spherical Planet Has A Mass Mp And Diameter Dp Physics Question

A spherical planet has a mass Mp and diameter Dp. A particle of mass m falling freely near the surface of this planet will experience an acceleration due to gravity, equal to

Options

(a) 4GMp / dp²
(b) GMpm / dp²
(c) GMp / dp²
(d) 4GMpm / dp²

Correct Answer:

4GMp / dp²

Explanation:

Gravitational attraction force on a parcticle B,
Fᵥ = GMₚm / (Dₚ / 2)²
Acceleration of particle due to gravity
a = Fᵥ / m = 4GMₚ / D²ₚ

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