Does gravity increase as mass get compressed and dense?

So far I know gravity is relative to mass but what if Earth was shrunk into the size of USA shall we experience the same gravity and weight or more? If not how can Earth ever become a black hole? I have read that if Earth was compressed to the size of a 50 cent coin it would become a black hole that not even light... show more So far I know gravity is relative to mass but what if Earth was shrunk into the size of USA shall we experience the same gravity and weight or more? If not how can Earth ever become a black hole? I have read that if Earth was compressed to the size of a 50 cent coin it would become a black hole that not even light can escape from it's gravity. It's confusing.
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