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29-12-2023
Physics

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Two concentric spherical shells have masses m₁ and m₂ and radii r₁ and r₂. What is the force exerted by this system on a particle of mass m?
(a) G⋅m₁⋅m₂/r₁²
(b) G⋅m₁⋅m₂/(r₁+r₂)²
(c) 2G⋅m₁⋅m2/(r₂−r₁)
(d) G⋅m⋅(m₁+m₂)/(r₁+r₂)²

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