Practice question
Question
What is the gravitational force on a 7kg mass 6m from the center of a spherical shell of mass 300kg and radius 4m? (G\=6.67×10−11N m2/kg2)
Explanation
Outside shell: F = GMmr2. F = 6.67×10−11×300×762. F = 1.401×10−836≈3.89×10−10N. As per NCERT, applying relevant law/formula with correct units and sign convention leads to 3.9 × 10⁻¹⁰ N. This satisfies dimensional consistency and physical conditions given, so option C is scientifically correct.