Invisibity cast on an object

[Seven]

So, if invisibility is cast on an object, the duration would be 24 hours.
Would attacking or running into an invisible object end the spell early?
How about attacking with the invisible object?

[chiisu81]

In my interpretation: attacking with the invisible object negates that effect, whereas attacking or running into an invisible object/person does not negate the effect.

[Solomoriah]

Left to the GM's interpretation, though I do not disagree with Chi here.

[chiisu81]