List all the frces acting on the eraser with respect to Newtons 1 and 2 Laws.

The question was truncated. The earth is motionless in fixed space

What do YOU think ?
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OK gravity is a force acting on it
And I understand Newtons laws applying to this a
The eraser will stay there until acted upon by something else.
But does the ledge play a part... is it a force? I mean if the moleculed inside me are a force at equilibrium with outside pressure? I fear I am overthinking this. Pleasr help