Practice question
Question
What is the gravitational force on a 9kg mass 7m from the center of a spherical shell of mass 350kg and radius 5m? (G\=6.67×10−11N m2/kg2)
Explanation
Outside shell: F = GMmr2. F = 6.67×10−11×350×972. F = 2.101×10−849≈4.29×10−10N. As per NCERT, applying relevant law/formula with correct units and sign convention leads to 4.3 × 10⁻¹⁰ N. This satisfies dimensional consistency and physical conditions given, so option C is scientifically correct.
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