Practice question
Question
What is the gravitational force on a 12kg mass 10m from the center of a spherical shell of mass 600kg and radius 8m? (G\=6.67×10−11N m2/kg2)
Explanation
Outside shell: F = GMmr2. F = 6.67×10−11×600×12102. F = 4.8036×10−8100 = 4.80×10−10N. As per NCERT, applying relevant law/formula with correct units and sign convention leads to 4.8 × 10⁻¹⁰ N. This satisfies dimensional consistency and physical conditions given, so option B is scientifically correct.