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The coin join in the cardboard when you pulled it


공원 태연 / TaengPark

The coin will fall inside the glass it is all because of the law of inertia which mean state that an object in motion will remain in mention unless act upon by unbalance force.this force could be anything from wind resestance and friction.if this force don't exsis any object will move at a constant vilocity when the force was apply.