Practice question
Question
What is the gravitational force on a 13kg mass 11m from the center of a spherical shell of mass 700kg and radius 9m? (G\=6.67×10−11N m2/kg2)
Explanation
Outside shell: F = GMmr2. F = 6.67×10−11×700×13112. F = 6.0689×10−8121≈5.02×10−10N. As per NCERT, applying relevant law/formula with correct units and sign convention leads to 5.0 × 10⁻¹⁰ N. This satisfies dimensional consistency and physical conditions given, so option B is scientifically correct.
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