Practice question

Distance to 22kg: 22−10 = 12m. U = −Gm1r1−Gm2r2. U = −6.67×10−11(1110+2212). U = −6.67×10−11(1.1+1.833)≈−1.96×10−10J/kg. As per NCERT, applying relevant law/formula with correct units and sign convention leads to -2.0 × 10⁻¹⁰ J/kg. This satisfies dimensional consistency and physical conditions given, so option B is scientifically correct.