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PhysicsMaths

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It is indicated that the diagram is drawn to scale, so you need to use a measuring instrument (ruler) to work out the proportions

The distance from the centre of the planet to the centre of x is approximately 4.5cm (based on the screenshot), and the distance to y is 6.75cm

Using the formula Fg = GmM/d^2, and substituting the values for r, the answer ends up being 2.25
 

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