Practice question
Question
Why does an object require more energy to escape from a higher altitude than to reach that altitude?
Explanation
Escape energy from altitude h is GMmR+h, while energy to reach h from the surface is GMm(1R−1R+h), which is less. Escape requires overcoming all potential energy to infinity. As per NCERT, applying relevant law/formula with correct units and sign convention leads to Escape needs energy to infinity. This satisfies dimensional consistency and physical conditions given, so option B is scientifically correct.