Hi all, I'm new here. So anyways, I have been studying for exams by going through my old tests, and I found a question from one of them that I cant solve...I hope someone can help me. 1. A person stands on a set of bathroom scales which have been calibrates in newtons. The scales read 500N (assume 3 sig figs) A)What would the reading be if the same person stood on the scales on a planet where the gravitational field strength, g is 14 N/kg? B) If this planet had a mass of 7.0 x 10^24 kg, what would its radius be? C) What mass would this person weigh at an altitude of 2.8 x 10^6 m above the planet's surface? 2. Relevant equations Well I used the equations for A) F=mg B) F = G (mass planet) (mass object) / d^2 C) I don't know what equation to use... So what I did: for A) I used Fg=mg so: Fg = mg 500 = m (9.8) m = 51 then I substituted for the planet. Fg = m(14) Fg = (51)(14) Fg = 714 For B) I used F = G (mass planet) (mass object) / d^2 so, Fg = 6.67 x 10^-9 *7.0x10^24 / d^2 d^2 = 4.669 d = 2160789.4 km For C) given height, I dont know what equation to use. So really, I don't know whether I used my equations correctly, so I would appreciate someone to point out my errors.