(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

For this problem, use ratios only to obtain the weight of a person at the following distances. Assume the person weighs 980N on the surface of Earth.

a) 128 000km above the surface of Earth

b) 4.5 times the distance from the centre of Earth

c) 745 400km from Earths Centre.

2. Relevant equations

It basically evolves around:

Fg = G x m1 x m2

r(squared)

Fg = force of gravity

G = constant gravitional force

m1 and m2 = mass

r = distance

however,

we are using a ratio so the teacher told us that it is:

fg1 x r1(squared) = fg2 x r2(squared)

r = distance

fg = force of gravity

3. The attempt at a solution

We started this yesterday in class and he told us to try it so I am not sure how to attempt this. I tried doing a FBD ( Free body diagram ) to make the question abit easier, but no success. Please help me.

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# Homework Help: Universal law of gravity involving ratios

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