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## Homework Statement

I got a problem wrong on a quiz and I'm pretty positive on all the other questions as being correct but maybe this one..

How does the gravitational force at the event horizon (Schwarzschild radius) behave as the black hole mass increases?

## Homework Equations

## The Attempt at a Solution

I assumed that by definition of the event horizon the force is constant no matter how the mass changes since the radius will move with it. Is this correct?