Joe has a weight of 350 N (about 79 lb) when he is standing on the surface of the Earth.?

Science & Mathematics by Anonymous 2018-06-24 02:03:14

Social Science

5 answers

What would his weight (the gravitational force due to the Earth) be if he tripled his distance from the center of the Earth by flying in a spacecraft?

Anonymous

His weight will decrease to 1/9 or ~ 8.77 lbs
Anonymous

W = We*(r/3r)^2 = We/9 = 38.89 N
Anonymous

Weight force on earth is 350 N at 9.8 m/s^2 acceleration due to gravity. Weight force at three times this distance of 6400 km g = GMm/R^2 Here GM and m are constant and R becoes 3R (3r)^2 = 9R^2 so g drops to 1/9g and the weight force drops to 350 * 1/9 N
Anonymous

Yes, I think so
Anonymous

Gravity is an inverse square law 3x the distance, 1/9th the weight (1 / 3 * 3) so 350 N / 9