Practice question
Question
What is the gravitational force on a 10kg mass 8m from the center of a spherical shell of mass 450kg and radius 6m? (G\=6.67×10−11N m2/kg2)
Explanation
Outside shell: F = GMmr2. F = 6.67×10−11×450×1082. F = 3.0015×10−864≈4.69×10−10N. As per NCERT, applying relevant law/formula with correct units and sign convention leads to 4.7 × 10⁻¹⁰ N. This satisfies dimensional consistency and physical conditions given, so option C is scientifically correct.