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## Homework Statement

## Homework Equations

ΔPE = G × M₁ × M₂ (1/Ri - 1/Rf)

where

G = gravitational constant

M₁ = mass of one object

M₂ = mass of the other object

Ri = initial distance

Rf = final distance

ΔPE = -ΔKE

## The Attempt at a Solution

My solution is v = 2√(GM/d). I am making sure it is correct.