Looking through the forum (Approximation of the second order derivative) it seems as though P1 is inappropriate for second order and higher time derivatives. So how would I go about dealing with these? The examples only ever use first order.
Given these are very common in wave equations I find it hard to believe that FEM does not a have a way to deal with these, but on the off chance FEM is not suitable for second order time derivatives what is the suitable way to go around this?