Question

You weigh 610 n. what would you weigh if the earth were six times as massive as it is and its radius were three times its present value? answer in units of n.

Answer 1

F1 = G M1 M2 R^2 force between objects M1 and M2

F2 = G M1 * 6 M2 / (3 * R)^2

F2 = 6 / 9 * F1

F2 = 2/3 * 610 n = 407 n