Question

Calculate the energy needed for moving a mass of 4kg from the centre of the earth to its surface. If radius of the circle is 6400km and acceleration due to gravity at the surface of the earth is g= 10m/s

Answer 1

Answer:256000000joules

Explanation:

W = mgh h=65400km=65400000m

W = 4×10×65400000= 654×10^6joules