Practice question

ΔE = −GMEm(1r2−1r1). r1 = 5.76×107m, r2 = 1.152×108m. ΔE = −6.67×10−11×6×1024×500(11.152×108−15.76×107). ΔE = −2.001×1017(−8.681×10−9)≈1.74×109J. As per NCERT, applying relevant law/formula with correct units and sign convention leads to 1.7 × 10⁹ J. This satisfies dimensional consistency and physical conditions given, so option A is scientifically correct.