hi.i have searched for an inertia formula but could not find anything.after that i thought that maybe there is not.and now i want to ask you a question.assume that we have a large mass (which has a large inertia )witch is connected to a spring.we launch another mass to the spring.and then i want to know the length of spring .

Question

anonymous · Answer

The question is not properly phrased I guess. The length of the spring has got nothing to do with what is connected to it. But in case you are asking the compressions/ elongations in the spring, then more data needs to be provided.

anonymous · Answer

Data provided are not sufficient to answer your problem.To find out the elongation you have to be provided with the spring constant and the masses hung.