If an experiment does not obey the law of conservation of momentum, what can you conclude about that situation

Answer 1

Error in designing the experiment, i.e. the law of conservation of momentum doesn't apply to the physical situation, or error in measuring one or more variables in the experiment.

Answer 2

The experiment lets say would consist of two colliding masses moving at different velocities and energy. If at collision the experiment shows that mass is lost during collision it would indicate a non conservative system. The result would be a change in mass structure and their momentum would not be conserved.
The law of conservation of momentum is true and only true if the mass systems are perfectly elastic..In which case it would be called a conservative system.

Answer 3

You can conclude that it is against the laws of nature. That the experiment was inconsistent with the law of equivalence of form. We should also note that an experiment undertaken by an experimenter is perceived through the experimenter's attributes. Accordingly since your attributes are not in equilibrium with the experiment, its process and thus out come, it is true to say that the law of equivalence of form has not been achieved. e.g. a lot of scientists talk about Einstein's theory, however except a few have absolutely no idea of what he was actually trying to explain, they only understood what he was trying to explain according to the degree that their attributes were in accordance with Einstein's.

Answer 4

That a net force was applied from outside the system