40. How much energy is required to move a mass m object from the Earth’s surface to an altitudetwice
問題詳情
40. How much energy is required to move a mass m object from the Earth’s surface to an altitudetwice the Earth’s radius RE? (A) (-1/2)mgRE (B) (1/2)mgRE (C) (-2/3)mgRE (D) (2/3)mgRE (E) (1/4)mgRE